212 results on '"M. Vered"'
Search Results
2. Preoperative MRI for oral tongue squamous cell carcinoma: timing and correlation to histopathology
- Author
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N. Rozendorn, G. Greenberg, O. Madgar, I. Gluck, M. Vered, E. Alon, and A. Dobriyan
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Otorhinolaryngology ,Surgery ,Oral Surgery - Abstract
Magnetic resonance imaging (MRI) is an integral part of the evaluation of local and regional disease in tongue squamous cell carcinoma prior to surgery. The aim of this study was to evaluate the accuracy of MRI in assessing tumour dimensions, as well as the impact of the time-lag from diagnostic biopsy on the accuracy of MRI. The medical records of 64 patients with tongue carcinoma were reviewed retrospectively. Tumour maximum diameter and tumour depth of invasion were compared between pathology and MRI (T1- and T2-weighted). MRI-derived maximum tumour diameter and depth of invasion correlated strongly with histopathology: T1-weighted (r = 0.700 and r = 0.813, respectively) and T2-weighted (r = 0.734 and r = 0.834, respectively). A significant correlation was found between measurements on T1 and T2 MRI for both parameters (P = 0.955 and P = 0.984, respectively). The accuracy rate of MRI for T-staging of early tumours was low: 10% for T1 tumours; 39.3% for T2 tumours. A time-lag of less than 2 weeks between the diagnostic biopsy and MRI adversely affected the correlation of tumour dimensions. MRI is a reliable tool for evaluating tongue carcinoma; however, it overestimates early tumours. A 2-week delay after diagnostic biopsy is desired before completing an MRI. Alternatively, if logistics allow, a pre-biopsy MRI is preferred, especially for T1-T2 tumours.
- Published
- 2022
3. Author response for 'Expression of stem cell markers in stroma of odontogenic cysts and tumors'
- Author
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null M. Chacham, null G Almoznino, null A Zlotogorski‐Hurvitz, null A Buchner, and null M Vered
- Published
- 2020
- Full Text
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4. Author response for 'Expression of stem cell markers in stroma of odontogenic cysts and tumors'
- Author
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M. Chacham, G Almoznino, A Buchner, M Vered, and A Zlotogorski‐Hurvitz
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Pathology ,medicine.medical_specialty ,Stroma ,medicine ,Biology ,Stem cell marker ,Odontogenic - Published
- 2020
- Full Text
- View/download PDF
5. An audit and evaluation of appropriateness of perioperative allogenic red blood cell transfusion in liver surgery
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Jad Abou-Khalil, T. Lenet, Dean Fergusson, Alan Tinmouth, Fady Balaa, A. Zahrai, K. Bertens, Laura Baker, Guillaume Martel, A. Workneh, Daniel I. McIsaac, and M. Vered
- Subjects
Liver surgery ,medicine.medical_specialty ,Hepatology ,business.industry ,Red Blood Cell Transfusion ,Gastroenterology ,medicine ,Perioperative ,Audit ,business ,Surgery - Published
- 2020
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6. Clinical Pathologic Conference Case 3: A Challenging Case of an Enlarging Swelling of the Maxilla
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M. Vered, A.C. Torres-Rendon, A. Jay, and Paul M. Speight
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Adult ,Male ,Osteosarcoma ,medicine.medical_specialty ,business.industry ,Odontogenic Tumors ,Jaw Neoplasms ,Pathology and Forensic Medicine ,Surgery ,Diagnosis, Differential ,Maxilla ,medicine ,Humans ,Female ,Radiology, Nuclear Medicine and imaging ,Dentistry (miscellaneous) ,Oral Surgery ,Swelling ,medicine.symptom ,Tomography, X-Ray Computed ,business - Published
- 2013
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7. [Oral medicine in Israel: Current status and future directions]
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D J, Aframian and M, Vered
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Health Policy ,Oral Medicine ,Humans ,Oral Health ,Health Promotion ,Israel ,Global Health ,Mouth Diseases ,World Health Organization - Abstract
The oral cavity-body relationships are bi-directional: oral diseases affect the welfare and health of the individual, while diseases and conditions of organs and tissues in the human body affect oral health. The global policy of the World Health Organization is to improve oral health in the 21st century as an integral part of promoting our general health. During the recent years the knowledge of the dental profession has grown exponentially and widened its fields of interest and this has led to impressive advances at both clinical and research levels. Oral medicine, which is a recognized, licensed specialty in Israel, is a definite example that reflects this process. In the last decade residency programs in oral medicine are in the process of constant increased demand. The authors discuss this trend and comment on the need to maintain excellence in this specialty.
- Published
- 2016
8. [Biopsy from the oral cavity: Why, when, how and especially what not]
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M, Vered and A, Zlotogorski-Hurvitz
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Microscopy ,Biopsy ,Dentists ,Humans ,Mouth Neoplasms ,Mouth Diseases ,Specialization - Abstract
Caries and periodontal disease are the most common pathologies encountered by general dental practitioners on a daily basis. Although less frequently, the oral cavity is also affected by a plethora of pathologic lesions that may represent either a local process or may be a manifestation of systemic conditions. The etiology of these lesions is diverse and ranges from congenital/ developmental, reactive, to neoplastic (benign and malignant), metabolic and hereditary. These lesions are expected to be recognized by the dental clinicians whose main concern would be to achieve a prompt and accurate microscopic diagnosis. The way to a microscopic diagnosis goes through a biopsy procedure. The principles that should guide the dental practitioner for producing a high quality, artefact-free tissue sample from the oral cavity are reviewed in the article together with notes on errors that should be avoided. The patient's life can sometimes depend on a tissue sample as small as 0.5 cm, hence the utmost importance of the strategic and technique-related considerations to be taken by the general dental practitioner prior to performing a biopsy from the oral cavity. In certain cases, the dental practitioner should use the services of specialists in oral medicine or oral and maxillofacial surgery in order to proceed with the biopsy procedure and get a prompt and accurate diagnosis.
- Published
- 2016
9. [Manifestation of Zoster in the Oral Cavity]
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M, Vered and A, Zlotogorski-Hurvitz
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Herpesvirus 3, Human ,Humans ,Female ,Middle Aged ,Mouth Diseases ,Acute Pain ,Herpes Zoster - Abstract
Zoster (shingles) is assumed to affect 10-20% of the individuals who have been exposed to the varicella zoster virus (VZV). It is expected to develop among the elderly, usually on the background of a weakened immune system. In those cases that the trigeminal branches are involved by zoster, unilateral mucosal and cutaneous vesiculo-ulcerative lesions will develop. Intense pain usually precedes the overt lesions of zoster, which sometimes might mimic acute pain of dental origin. Careful anamnesis and thorough clinical examination should lead to a correct diagnosis. Since zoster, in general, is associated with serious morbidity, including post-herpetic neuralgia, ocular damage and hearing deficits, the Centers for Disease Control and Prevention (CDC) currently recommend shingles vaccination, especially for those who are60-year old.
- Published
- 2016
10. Partial amino acid sequence of porcine elastase II
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Arieh Gertler, M. Vered, and Yigal Burstein
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Swine ,Stereochemistry ,Chymotrypsinogen ,Hydroxylamine ,Hydroxylamines ,Biochemistry ,medicine ,Animals ,Peptide bond ,Trypsin ,Amino Acid Sequence ,Cyanogen Bromide ,Peptide sequence ,chemistry.chemical_classification ,Binding Sites ,Chymotrypsin ,Pancreatic Elastase ,biology ,Chemistry ,Elastase ,Active site ,Peptide Fragments ,Amino acid ,biology.protein ,medicine.drug - Abstract
The partial amino acid sequence of porcine elastase II, isolated from crude trypsin Type II, was determined. The enzyme consists of two polypeptide chains, a light chain composed of 11 residues, and a heavy chain (Mr = 23 500) with four intrachain disulfide bridges; the two chains are held together by one interchain disulfide bond. Elastase II was fragmented into several peptides by chemical cleavages with CNBr at the two methionine residues, 99 and 180 (chymotrypsinogen numbering), and with hydroxylamine at the peptide bond following DIP-Ser195. About 50% of the sequence was determined and the positions of 120 amino acids were located, including the light chain residues and most of the active site residues. The partial sequence shows 64% difference between porcine elastase II and elastase I and only 26% difference between porcine elastase II and bovine chymotrypsin B.
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- 2009
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11. [Medical image enhancement: Sharpening]
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L, Kats and M, Vered
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Radiographic Image Enhancement ,Humans ,Radiography, Dental, Digital ,Artifacts - Abstract
Most digital imaging systems provide opportunities for image enhancement operations. These are applied to improve the original image and to make the image more appealing visually. One possible means of enhancing digital radiographic image is sharpening. The purpose of sharpening filters is to improve image quality by removing noise or edge enhancement. Sharpening filters may make the radiographic images subjectively more appealing. But during this process, important radiographic features may disappear while artifacts that simulate pathological process might be generated. Therefore, it is of utmost importance for dentists to be familiar with and aware of the use of image enhancement operations, provided by medical digital imaging programs.
- Published
- 2015
12. [Pseudo-color filter in two-dimensional imaging in dentistry]
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L, Kats and M, Vered
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Radiographic Image Enhancement ,Color ,Humans ,Radiography, Dental, Digital ,Dental Caries - Abstract
Most digital systems that are currently used in two-dimensional imaging in dentistry provide opportunities for different image processing filters. One possible means of enhancing digital radiographic image is pseudocoloring (i.e., color conversion of gray-scale images). Recently, this method has become widely used in digital radiology. The human eye is more sensitive to differences in color than to differences in shades of gray. Theoretically, converting a gray scale intensity level of a digital image into colors could enhance the radiographic information. There have been some studies that applied pseudocoloring of digital radiographic images for the detection of caries and periodontal defects. However, thus far, this method failed to show a significantly improved ability for the detection of these lesions. Further investigations are necessary in order to develop specific algorithms that will increase the validity of pseudocoloring in two-dimensional imaging in dentistry.
- Published
- 2015
13. [Nutraceuticals in the combat against oral cancer]
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A, Zlotogorski-Hurvitz, A, Dayan, D, Dayan, G, Chaushu, T, Salo, and M, Vered
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Survival Rate ,Curcumin ,Tea ,Head and Neck Neoplasms ,Squamous Cell Carcinoma of Head and Neck ,Dietary Supplements ,Carcinoma, Squamous Cell ,Tumor Microenvironment ,Humans ,Nanotechnology ,Antineoplastic Agents ,Mouth Neoplasms ,Prognosis - Abstract
Head and neck squamous cell carcinoma (HNSCC), the eighth most common cancer worldwide, accounts for approximately 600,000 new cases per year. The mobile tongue is the most common site for oral cancer and is associated with a poorer survival than other HNSCC sites. Standard therapeutic strategies have failed to significantly improve survival rates that have remained around 50% over the past four decades. In the last decade intense investigations on oral cancer highlighted the mandatory role of the tumor microenvironment (TME), in addition to the genetic aberrations and molecular biology changes within the cancer cells. Furthermore, the molecular crosstalk between cancer cells and TME components (i.e., cancer-associated fibroblasts, inflammatory pro-tumorigenic cells, etc.) has a crucial role in growth, invasion, spread and metastases of the cancer cells and consequently leads to poor prognosis. Recent studies suggest that plant-derived dietary agents nutraceuticals, especially curcumin and green tea, have the advantage to combat both malignant cells and TME components, unlike standard anti-cancer protocols that target only cancer cells. However, due to a very low bioavailability, nutraceuticals do not currently constitute an integral part of these protocols. Ongoing developments in nanotechnology for improved delivery are expected to overcome their challenging pharmacokinetics.
- Published
- 2014
14. Cheilitis glandularis: clinico-histopathological diagnostic criteria
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S, Reiter, M, Vered, N, Yarom, C, Goldsmith, and M, Gorsky
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Adult ,Aged, 80 and over ,Male ,Metaplasia ,Oxyphil Cells ,Suppuration ,Mucins ,Lip Diseases ,Middle Aged ,Salivary Gland Neoplasms ,Salivary Glands, Minor ,Sialadenitis ,Diagnosis, Differential ,Young Adult ,Cheilitis ,Child, Preschool ,Lip Neoplasms ,Carcinoma, Squamous Cell ,Humans ,Female ,Child ,Aged ,Dilatation, Pathologic - Abstract
To present a combination of clinical and histopathological criteria for diagnosing cheilitis glandularis (CG), and to evaluate the association between CG and squamous cell carcinoma (SCC).The medical literature in English was searched from 1950 to 2010 and selected demographic data, and clinical and histopathological features of CG were retrieved and analysed.A total of 77 cases have been published and four new cases were added to the collective data. The clinical criteria applied included the coexistence of multiple lesions and mucoid/purulent discharge, while the histopathological criteria included two or more of the following findings: sialectasia, chronic inflammation, mucous/oncocytic metaplasia and mucin in ducts. Only 47 (58.0%) cases involving patients with a mean age of 48.5 ± 20.3 years and a male-to-female ratio of 2.9:1 fulfilled the criteria. The lower lip alone was most commonly affected (70.2%). CG was associated with SCC in only three cases (3.5%) for which there was a clear aetiological factor for the malignancy.The proposed diagnostic criteria can assist in delineating true CG from a variety of lesions with a comparable clinical/histopathological presentation. CG in association with premalignant/malignant epithelial changes of the lower lip may represent secondary, reactive changes of the salivary glands.
- Published
- 2010
15. Treatment modalities for chemo--and radiotherapy-induced oral mucositis--critical analysis and practical guidelines
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M, Vered, D, Dayan, and A, Buchner
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Stomatitis ,Clinical Protocols ,Radiotherapy ,Anti-Infective Agents, Local ,Mouthwashes ,Humans ,Antineoplastic Agents ,Feeding Behavior ,Dental Care ,Radiation Injuries - Abstract
Oral mucositis (OM), an inevitable side effect of almost all anti-cancer treatments, affects the patient's physiological functions and their psychological well being. In spite of numerous treatment modalities for this condition, there is still a lack of evidence-based clinical trials that can provide a single efficient pharmacologic agent or intervention for either prevention or treatment of OM. This study analyses and summarizes some of the more "accepted" modalities for treatment of OM. It is recommended that these modalities rely on simple, convenient and innocuous interventions, which should be adjusted for each individual complaint. Well-designed, controlled and standardized studies are necessary to validate effectiveness of available, as well as newly developed interventions for OM.
- Published
- 2004
16. Focal lymphocytic infiltration in aging human palatal salivary glands: a comparative study with labial salivary glands
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M, Vered, A, Buchner, E, Haimovici, Y, Hiss, and D, Dayan
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Adult ,Aged, 80 and over ,Male ,Aging ,Chi-Square Distribution ,Palate ,Humans ,Female ,Lymphocytes ,Middle Aged ,Salivary Glands, Minor ,Lip ,Aged - Abstract
Investigation of age-related prevalence of various types of focal lymphocytic infiltration (FLI) and degrees of histomorphologic changes was conducted on 120 biopsies of palatal and labial salivary glands (PSG and LSG, respectively) obtained from autopsy subjects free of salivary gland tumors/diseases. Biopsies were divided into young (30 years, n=30), adult (30-60 years, n=45) and old (60 years, n=45) age groups. A modified ChisholmMason grading system was used to record grades of FLI and a modified Greenspan et al. system was used to evaluate the severity of histomorphologic changes. The prevalence of FLI in PSG increased significantly from 10% in the young group to 46.6% in the old group (P=0.0012). No significant changes were found with aging in LSG. FLI was significantly more prevalent in the adult and old age groups in PSG as compared with LSG (P=0.015 and P=0.003, respectively). Both glands demonstrated significant histomorphologic changes among age groups (p0.0001); however, these changes were significantly less common in the old age group in PSG as compared to LSG (P=0.003). In cases showing severe histomorphologic changes, FLI was not present. Therefore, FLI should not be considered as part of the deteriorating histomorphologic changes that are usually encountered in salivary glands with aging. The immunologic profile of these infiltrates should be further clarified to understand their role, both in physiologic and pathologic conditions.
- Published
- 2001
17. 6 to 18 GhZ MMIC Phase Shifter: A New High Performance Switch MESFET
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A. Milano, I. Levin, and M. Vered
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Engineering ,business.industry ,Electrical engineering ,Capacitance ,law.invention ,Capacitor ,law ,Electronic engineering ,MESFET ,Reduction (mathematics) ,business ,Phase shift module ,TO-18 ,Monolithic microwave integrated circuit ,Electronic circuit - Abstract
Multioctave Phase Shifters are key items in E.W. systems. On the market only few MMIC items are available, whose performances are not good enough for some special application. The way how to improve the performances doesn't involve the circuit, which is pretty classical: improving the switching FET will lead to more significant achievements. For the well known reasons, (1), we decided to use MESFET as switching elements. Therefore we designed together the Phase Shifter and its switching element, tayloring the two designs one on each other. The main goals to the design were: a). reduction of the "ON" resistances; b). reduction of "ON" capacitances. We obtained the result at the expences of the "OFF" state parameters, which exceeded the goal performances in the device we wanted to improve. We performed the simulations using EESOF and SONNET C.A.D., for the circuits, and HELENA for MESFET simulations.
- Published
- 1997
- Full Text
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18. Congenital infantile hemangiopericytoma in the floor of mouth – a treatment dilemma
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M. Vered, Ariel Hirschhorn, Ran Yahalom, and Gahl Greenberg
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Dilemma ,medicine.medical_specialty ,Floor of mouth ,Otorhinolaryngology ,Infantile hemangiopericytoma ,business.industry ,Medicine ,Surgery ,Oral Surgery ,business ,medicine.disease - Published
- 2013
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19. Anti-ischemia activity of HU-211, a non-psychotropic synthetic cannabinoid
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M, Vered, A, Bar-Joseph, L, Belayev, Y, Berkovich, and A, Biegon
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Male ,Neurologic Examination ,Brain ,Brain Edema ,Hippocampus ,Receptors, N-Methyl-D-Aspartate ,Brain Ischemia ,Rats ,Rats, Sprague-Dawley ,Ischemic Attack, Transient ,Injections, Intravenous ,Nerve Degeneration ,Animals ,Dronabinol ,Gerbillinae - Abstract
The novel tricyclic-terpenoid type cannabinoid, HU-211, was tested in gerbils and rats for protection against the effects of cerebral ischemia. Our transient ischemic models in gerbils and rats are based on the protection afforded against the lethal effects of global ischemia. HU-211 gave over 30% protection, by i.v. administration. The optimal dose ranges of HU-211 were between 5 and 10 mg/kg i.v. In gerbils we used a transient ischemia model induced by occlusion (10 min) of the bilateral common carotid arteries (BCCA). HU-211, 8 mg/kg i.v., gave a significantly (por = 0.05) better in vivo performed than a control group over three days following ischemia. Histology performed in gerbil model also resulted in significantly (p0.001) diminished degeneration area of CA1 in the hippocampus after treatment of HU-211. In the rat model, after four vessel occlusion (4VO) (20 min), HU-211 treatment significantly (p0.01) improved neurobehavior scoring. These results show that the new synthetic cannabinoid can protect against hippocampal neuron damage due to selective brain injury induced by cerebral global ischemia in gerbils or rats.
- Published
- 1994
20. Anti-Ischemia Activity of HU-211, a Non-Psychotropic Synthetic Cannabinoid
- Author
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M. Vered, L. Belayev, Anat Biegon, Y. Berkovich, and Avi Bar-Joseph
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business.industry ,medicine.medical_treatment ,Ischemia ,Histology ,Pharmacology ,medicine.disease ,Gerbil ,Neuroprotection ,In vivo ,Occlusion ,medicine ,Hippocampus (mythology) ,Cannabinoid ,business - Abstract
The novel tricyclic-terpenoid type cannabinoid, HU-211, was tested in gerbils and rats for protection against the effects of cerebral ischemia. Our transient ischemic models in gerbils and rats are based on the protection afforded against the lethal effects of global ischemia. HU-211 gave over 30% protection, by i.v. administration. The optimal dose ranges of HU-211 were between 5 and 10 mg/kg i.v. In gerbils we used a transient ischemia model induced by occlusion (10 min) of the bilateral common carotid arteries (BCCA). HU-211, 8 mg/kg i.v., gave a significantly (p &2264; 0.05) better in vivo performed than a control group over three days following ischemia. Histology performed in gerbil model also resulted in significantly (p < 0.001) diminished degeneration area of CA1 in the hippocampus after treatment of HU-211. In the rat model, after four vessel occlusion (4VO) (20 min), HU-211 treatment significantly (p
- Published
- 1994
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21. P1.31. Experience with 15 cases of primary intraosseous carcinoma of the jaws
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R. Yahalom, M. Vered, S. Teicher, Y.P. Talmi, L. Bedrin, and A. Dobriyan
- Published
- 2009
- Full Text
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22. Odontoma.
- Author
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M., Vered, C. B., Fowler, B. W., Neville, and M., Soluk Tekkeşin
- Published
- 2017
23. Ameloblastoma.
- Author
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M., Vered, S., Muller, and K., Heikinheimo
- Published
- 2017
24. Photo-CIDNP study of interactions of serine proteinases with their protein inhibitors
- Author
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Shulamith Weinstein, M. Vered, Karol A. Muszkat, and I. Khait
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Turkeys ,Serine Proteinase Inhibitors ,Photochemistry ,CIDNP ,Stereochemistry ,Chemistry ,Spectrum Analysis ,Serine Endopeptidases ,Organic Chemistry ,Complex formation ,Biophysics ,Tryptophan ,Proteins ,General Medicine ,Flavin group ,Biochemistry ,Bovine Pancreatic Trypsin Inhibitor ,Biomaterials ,Serine proteinases ,Endopeptidases ,Animals ,Cattle ,Protease Inhibitors ,Tyrosine ,Protein Binding - Abstract
Photochemically induced dynamic nuclear polarization was used to study the accessibility of surface tyrosine and tryptophan residues in proteinases, in their protein inhibitors and in the proteinase–inhibitor complexes. The accessibility probe is the triplet of 10-(carboxyethyl) flavin formed by optical excitation. On complex formation we observe accessibility loss in the surface tyrosines and tryptophans in the proximity of the proteinase–inhibitor contact site, and in the case of bovine pancreatic trypsin inhibitor, in more distant tyrosines as well.
- Published
- 1983
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25. A macroseismic study and the implications of structural damage of two recent major earthquakes in the Jordan Rift
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M. Vered and H. L. Striem
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geography ,Geophysics ,Rift ,geography.geographical_feature_category ,Geochemistry and Petrology ,Coastal plain ,Epicenter ,Upper crust ,Magnitude (mathematics) ,Geology ,Seismology ,Rift valley - Abstract
A detailed macroseismic study of the July 11, 1927 earthquake was carried out. A quantitative analysis of damage data provided a correlation for estimating (MM) intensities: I = 6.4 + 1.2 log (percentage of damaged houses). Using axis lengths and areas bounded by the ensuing isoseismal lines, the depth (16 to 28 km) of the event was estimated, and its probable epicenter located near Damiya bridge on the Jordan river. A comparison with the equivalent parameters, inferred from instrumental records, shows agreement between both sets of results and thus confirms the validity of the approach used in the macroseismic study. The same procedure of studying macroseismic data was applied to an earlier (January 1, 1837) destructive earthquake. It was found that this latter event orginated in the upper crust, eastward of Safed, with a 6.25 to 6.5 magnitude. The isoseismals of both these major earthquakes are elongated in a north-south direction, along the major structural trend in the area. The southern coastal plain of Israel seems generally less vulnerable to Jordan Rift Valley earthquakes than inland regions of similar epicentral distances, though local pockets of anomalous intensities are observed for both earthquakes.
- Published
- 1977
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26. Subcellular localization and further characterization of a new elastase inhibitor from pneumococci
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M Vered, Sanford R. Simon, and A Janoff
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Proteases ,Neutrophils ,Immunology ,Cathepsin G ,Microbiology ,Substrate Specificity ,Cell membrane ,chemistry.chemical_compound ,medicine ,Humans ,Pancreatic elastase ,Pancreatic Elastase ,biology ,Cell Membrane ,Elastase ,Elastin ,Elastase inhibitor ,Streptococcus pneumoniae ,Infectious Diseases ,medicine.anatomical_structure ,chemistry ,Enzyme inhibitor ,Neutrophil elastase ,biology.protein ,Parasitology ,Autolysis ,Research Article ,Subcellular Fractions - Abstract
Streptococcus pneumoniae contains an inhibitor of human neutrophil elastase. The agent does not inhibit other proteases, including neutrophil cathepsin G and pancreatic elastase. It is active in the presence of insoluble elastin as well as synthetic elastase substrates. The inhibitor is present in the pneumococcal cell membrane. [125I]elastase binding studies and inhibition experiments with intact bacterial autoplasts suggest that this agent has its elastase-binding site(s) exposed on the outside of the bacterial cell membrane. Native and randomized membrane vesicles also show equal inhibitory activity. Active inhibitor can be solubilized from pneumococcal membranes by treatment with a dipolar ionic detergent and can then be reconstituted, in active form, within artificial liposomes. Complex formation between the neutrophil elastase inhibitor and neutrophil elastase may involve noncovalent associations. Although elastase containing a covalently bound substrate analog no longer binds the pneumococcal inhibitor, the present study shows that complex formation is nevertheless independent of neutrophil elastase catalytic activity. Specific inhibitor activity and inhibitor release during bile salt-stimulated autolysis are greater in a nonnecrotizing pneumococcal strain (type I) than they are in a necrotizing strain (type III) or in Klebsiella pneumoniae. These results may help explain the frequent resolution of some pneumococcal pneumonias, despite the presence in the early pneumonic exudate of many neutrophils containing an elastolytic protease capable of injuring lung connective tissue.
- Published
- 1985
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27. A unified approach to the representation of seismic sources
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S. J. Singh, Ari Ben-Menahem, and M. Vered
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General Energy ,Classical mechanics ,Field (physics) ,Surface wave ,Isotropy ,Coordinate system ,Displacement field ,Spherical coordinate system ,Cylinder ,Representation (mathematics) ,Mathematics - Abstract
An attempt is made to give a unified treatment to the problem of the representation of various sources commonly used in theoretical studies in seismology. Beginning with the Stokes-Love solution for a concentrated force, the displacement field due to a dipolar source in a homogeneous, isotropic, unbounded medium is expressed in terms of the eigenvector solutions of the vector Navier equation. This field is transformed to a spherical coordinate system having its origin at the centre of the Earth. The transformed field is then used to calculate the jumps in the displacements and stresses across the concentric spherical surface passing through the source. These jumps constitute a convenient representation of the source. Since it exhibits the properties of the source and not that of the medium, the above representation is also valid when the medium under consideration is bounded and inhomogeneous. A similar representation is obtained in the case of the circular cylinder coordinate system. This representation can be conveniently applied to investigate the excitation of various elastic fields in the Earth by earthquake sources such as the free oscillations, surface waves and residual static deformation.
- Published
- 1973
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28. Generalized reflection and transmission coefficients for seismic sources in a multi-layered spherical earth model
- Author
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Y. Sylman, Ari Ben-Menahem, and M. Vered
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Geophysics ,Transmission (telecommunications) ,Synthetic seismogram ,Geochemistry and Petrology ,Reflection (physics) ,Dislocation ,Seismogram ,Spherical Earth ,Geology ,Displacement (vector) ,Physics::Geophysics - Abstract
A method of propagating the components of the displacement across interfaces in a multi-layered spherical earth model is presented. It is useful both for explosion sources and tangential dislocation sources, buried in an arbitrary layer of the model. Combined with known techniques, our method yields a useful tool for generating synthetic seismograms for earthquake sources in realistic earth models.
- Published
- 1974
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29. Inhibitors of human neutrophil elastase in extracts of Streptococcus pneumoniae
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M, Vered, T, Schutzbank, and A, Janoff
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Chemistry ,Streptococcus pneumoniae ,Chemical Phenomena ,Pancreatic Elastase ,Neutrophils ,Tissue Extracts ,Chromatography, Gel ,Humans ,Electrophoresis, Polyacrylamide Gel ,Tissue Distribution ,Biomechanical Phenomena - Abstract
Alveolar architecture is spared during most pneumococcal pneumonias, despite the presence in pneumonic exudate of many neutrophils containing a potent elastase. We explored the possibility that pneumococci might contain an inhibitor of this enzyme. We found that pneumococcal extracts prepared by sonication or by lysis with sodium deoxycholate contained 2 different inhibitors of human neutrophil elastase. Both inhibitors were specific for neutrophil elastase and did not affect pancreatic elastase or trypsin. Inhibitor I was partly purified by affinity chromatography and preparative acrylamide gel electrophoresis and shown to be a negatively charged, low molecular weight substance that inhibited competitively (Lineweaver-Burk analysis). Inhibition depended on ionic interaction with the cationic enzyme and could be blocked by 0.15 M NaCl. For this reason, the first agent seemed unlikely to play an important role in modulating neutrophil elastase activity in inflammatory exudates and was not studied further. The second agent (Inhibitor II) eluted in the high molecular weight fraction during Sephacryl S-300 chromatography. Gradient SDS-polyacrylamide gel electrophoresis of partly purified Inhibitor II revealed an apparent molecular weight of 140,000 daltons. This agent inhibited noncompetitively and remained active in the presence of 0.15 M NaCl. Prolonged incubation with TPCK-trypsin resulted in cleavage of Inhibitor II into smaller fragments, which could be further dissociated by reduction with dithiothreitol. Inactivation of neutrophil elastase with N-acetyl-alanyl-alanyl-prolyl-valyl-chloromethyl ketone prevented complex formation between this enzyme and Inhibitor II, suggesting that an unblocked binding pocket in neutrophil elastase is required for its complexation to the noncompetitive pneumococcal inhibitor.(ABSTRACT TRUNCATED AT 250 WORDS)
- Published
- 1984
30. Inhibition of porcine elastase II by chicken ovoinhibitor
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M. Vered, Arieh Gertler, and Yigal Burstein
- Subjects
Chemical Phenomena ,Swine ,Size-exclusion chromatography ,Egg Proteins, Dietary ,Biochemistry ,Protein–protein interaction ,Affinity chromatography ,medicine ,Animals ,Chymotrypsin ,Trypsin ,Binding site ,Amino Acids ,chemistry.chemical_classification ,Binding Sites ,biology ,Pancreatic Elastase ,Egg Proteins ,Electrophoresis ,Chemistry ,Enzyme ,chemistry ,biology.protein ,Chickens ,medicine.drug - Abstract
Interaction of porcine elastase II with native and modified chicken egg-white ovoinhibitor was studied by determining the residual activity of the partially inhibited enzyme and by direct measurement of the stoichiometry of interaction using affinity chromatography, electrophoresis and gel filtration. It was found that the chymotrypsin binding site that is not modified by mild oxidation with N-chlorosuccinimide (Shechter et al., Biochemistry, (1977) 16, 992–997) is capable of binding elastase II as well. The binding of chymotrypsin and elastase II is mutually exclusive and the affinity for chymotrypsin is stronger. Binding of 2 mol trypsin as 1 mol elastase I by ovoinhibitor does not interfere with the binding of elastase II. There is also an indication that the second binding site for chymotrypsin is capable of forming a complex with an additional molecule of elastase II, but the binding is so weak that it could be detected only by electrophoresis.
- Published
- 1981
31. Inhibition of human neutrophil elastase by polyguanylic acid and other synthetic polynucleotides
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S, Simon, M, Vered, A, Rinehart, J, Cheronis, and A, Janoff
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Poly C ,Pancreatic Elastase ,Neutrophils ,Poly I ,Hydrolysis ,Poly G ,Humans ,Leukocyte Elastase ,Poly A ,Polyribonucleotides ,Substrate Specificity - Published
- 1988
32. Ameloblastic fibroma.
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S., Muller and M., Vered
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- 2017
33. Ameloblastoma, unicystic type.
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M., Vered, S., Muller, and K., Heikinheimo
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- 2017
34. Ameloblastoma, extraosseous/peripheral type.
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M., Vered, S., Muller, and K., Heikinheimo
- Published
- 2017
35. Improvement of stereopsis following strabismus surgery in adults: a retrospective analysis.
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Rock O, Golani T, David S, Vered M, Mosleh R, Armarnik S, and Wygnanski-Jaffe T
- Abstract
Objective: Adults who undergo strabismus surgery, in addition to cosmesis, could benefit from improved stereopsis. This improvement is associated with the performance of motor skill tasks in young adults; they reduce the risk of tripping or falling during everyday locomotion and improve reading efficiency. This study aimed to assess stereopsis level after strabismus surgery in adults who underwent strabismus surgery for any reason., Methods: Retrospective observational study of adult patients who underwent strabismus surgery at our institution between 2010 and 2022., Results: One hundred and thirty-two patients were included. Postoperatively, 48% had a stereo acuity better than 100 seconds of arc, and only 21.5% had no stereopsis. The most significant factor influencing improved stereopsis after surgery was the angle of strabismus postoperatively (p = 0.018). There was a statistically significant correlation between fusion at a distance and the stereo acuity (p = 0.0337). There was no statistically significant correlation between the stereo acuity level and the strabismus angle of deviation, the strabismus direction (vertical, horizontal, or combined), or the type (esotropia or exotropia) before or after the surgery. Although not statistically significant (p = 0.6579), the underlying cause categories were correlated with the stereo level. Patients with neurological causes demonstrated higher levels of stereopsis, followed by TED, whereas patients with childhood strabismus have the lowest probability of regaining stereopsis after surgery., Conclusions: Although long-standing strabismus reduces the potential for binocularity, surgery may be beneficial and improve stereopsis regardless of the cause of strabismus., (Copyright © 2024 Canadian Ophthalmological Society. Published by Elsevier Inc. All rights reserved.)
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- 2025
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36. Histopathologic and Molecular Insights Following the Management of Ameloblastomas via Targeted Therapies - Pathological and Clinical Perspectives.
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Hirschhorn A, Grynberg S, Campino GA, Dobriyan A, Patel V, Greenberg G, Yacobi R, Barshack I, Yahalom R, Toren A, and Vered M
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- Humans, Male, Female, Adult, Middle Aged, Young Adult, Adolescent, Proto-Oncogene Proteins B-raf genetics, Aged, Molecular Targeted Therapy, Ameloblastoma pathology, Ameloblastoma genetics, Ameloblastoma drug therapy, Jaw Neoplasms pathology, Jaw Neoplasms genetics, Jaw Neoplasms therapy
- Abstract
Purpose: Current standard of care for ameloblastoma (conventional/unicystic - mural type) usually mandates extensive bone resection that frequently necessitates immediate reconstruction with serious sequelae, especially among young patients. BRAF-mutated ameloblastomas can be targeted by BRAF inhibitors to markedly reduce their size, enabling conservative removal of residual tumor. We aimed to characterize the effect of post-treatment histomorphologic changes., Methods: Study included 14 patients, 11 mandibular and three maxillary tumors. Cases with very minimal residual tumor were defined as near-complete response, while those with mostly vital residual tumor as partial response. The epithelium component was scored for architectural and cellular changes, stroma - for fibrosis, inflammation and new bone formation, on a 3-tired score system: 0-no, 1-focal and 3-frequent changes. The mean scores of each parameter, total epithelium and total stroma were calculated and related to duration of treatment. Differences in the mean scores were investigated for mandibular tumors with near-complete response (n = 3) and partial response (n = 8)., Results: There were no significant differences in mean epithelium or stroma scores between tumors with near-complete and those with partial response (2.22 ± 0.68 versus 2.08 ± 0.43, p = 0.55; 1.41 ± 1.04 versus 1.43 ± 0.44, p = 0.27), suggesting that ameloblastomas have potential to undergo complete response to targeted treatment. This is probably dependent upon tumor/patient/treatment-related factors. Response to treatment appears to be predictable with neoplastic epithelium being first, while the stromal response increases during treatment, the entire process expanding over weeks-to-months., Conclusion: Albeit preliminary, these are the first comprehensive histomorphologic findings on BRAF-treated ameloblastomas. Analyzing the suggested parameters in tumors with partial response, should highlight which tumor component has responded/failed to respond. This could serve as a basis for decision-taking toward subsequent steps in adjuvant treatment (e.g., follow-up, conservative surgery, modifications/changes in treatment regimen, combinations of approaches), with a prime aim of jaw preservation and minimal risk of sequelae., Competing Interests: Declarations. Ethics Approval: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standard. The study was approved by our local IRB, SMC-9405-22. Consent to Participate: Informed consent was obtained from all individual participants (or their parent or legal guardian in the case of children under 16). Consent for Publication: For this type of study consent for publication is not required. Competing Interests: The authors declare no competing interests., (© 2024. The Author(s).)
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- 2024
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37. Artificial intelligence improves risk prediction in cardiovascular disease.
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Teshale AB, Htun HL, Vered M, Owen AJ, Ryan J, Tonkin A, and Freak-Poli R
- Abstract
Cardiovascular disease (CVD) represents a major public health issue, claiming numerous lives. This study aimed to demonstrate the advantages of employing artificial intelligence (AI) models to improve the prediction of CVD risk using a large cohort of relatively healthy adults aged 70 years or more. In this study, deep learning (DL) models provide enhanced predictions (DeepSurv: C-index = 0.662, Integrated Brier Score (IBS) = 0.046; Neural Multi-Task Logistic Regression (NMTLR): C-index = 0.660, IBS = 0.047), as compared to the conventional (Cox: C-index = 0.634, IBS = 0.048) and machine learning (Random Survival Forest (RSF): C-index = 0.641, IBS = 0.048) models. The risk scores generated by the DL models also demonstrated superior performance. Moreover, AI models (NMTLR, DeepSurv, and RSF) were more effective, requiring the treatment of only 9 to 10 patients to prevent one CVD event, compared to the conventional model requiring treatment of nearly four times higher number of patients (NNT = 38). In summary, AI models, particularly DL models, possess superior predictive capabilities that can enhance patient treatment in a more cost-effective manner. Nonetheless, AI tools should serve to complement and assist healthcare professionals, rather than supplant them. The DeepSurv model, selected due to its relatively superior performance, is deployed in the form of web application locally, and is accessible on GitHub ( https://github.com/Robidar/Chuchu_Depl ). Finally, as we have demonstrated the benefit of using AI for reassessment of an existing CVD risk score, we recommend other infamous risk scores undergo similar reassessment., Competing Interests: Declarations. Competing interest: The authors declare no competing interests., (© 2024. The Author(s), under exclusive licence to American Aging Association.)
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- 2024
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38. Gender-specific aspects of socialisation and risk of cardiovascular disease among community-dwelling older adults: a prospective cohort study using machine learning algorithms and a conventional method.
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Teshale AB, Htun HL, Owen AJ, Ryan J, Baker JR, Vered M, Reid CM, Woods RL, Berk M, Tonkin A, Neumann JT, Kilkenny MF, Phyo AZZ, Nelson MR, Stocks N, Britt C, and Freak-Poli R
- Subjects
- Humans, Female, Male, Aged, Prospective Studies, Australia, Sex Factors, Longitudinal Studies, Aged, 80 and over, Risk Factors, Algorithms, Cardiovascular Diseases prevention & control, Machine Learning, Independent Living
- Abstract
Background: Gender influences cardiovascular disease (CVD) through norms, social relations, roles and behaviours. This study identified gender-specific aspects of socialisation associated with CVD., Methods: A longitudinal study was conducted, involving 9936 (5,231 women and 4705 men) initially healthy, community-dwelling Australians aged 70 years or more from the ASPirin in Reducing Events in the Elderly (ASPREE) study and ASPREE Longitudinal Study of Older Persons, with a median follow-up time of 6.4 years. Variable categorisation, variable selection (using machine learning (ML) models; Elastic Net and extreme gradient boosting) and Cox-regression were employed separately by binary gender to identity socialisation factors (n=25 considered) associated with CVD., Results: Different socialisation factors were identified using the ML models. In the Cox model, for both genders, being married/partnered was associated with a reduced risk of CVD (men: HR 0.76, 95% CI 0.60 to 0.96; women: HR 0.67, 95% CI 0.58 to 0.95). For men, having 3-8 relatives they felt close to and could call on for help (HR 0.76, 95% CI 0.58 to 0.99; reference <3 relatives), having 3-8 relatives they felt at ease talking with about private matters (HR 0.70, 95% CI 0.55 to 0.90; reference <3 relatives) or playing games such as chess or cards (HR 0.82, 95% CI 0.67 to 1.00) was associated with reduced risk of CVD. For women, living with others (HR 0.71, 95% CI 0.55 to 0.91) or having ≥3 friends they felt at ease talking with about private matters (HR 0.74, 95% CI 0.58 to 0.95; reference <3 friends) was associated with a lower risk of CVD., Conclusions: This study demonstrates the need to prioritise gender-specific social factors to improve cardiovascular health in older adults., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2024. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2024
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39. Navigating artificial intelligence in care homes: Competing stakeholder views of trust and logics of care.
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Neves BB, Omori M, Petersen A, Vered M, and Carter A
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- Humans, Qualitative Research, SARS-CoV-2, Interviews as Topic, Artificial Intelligence, Trust, COVID-19, Nursing Homes organization & administration
- Abstract
The COVID-19 pandemic shed light on systemic issues plaguing care (nursing) homes, from staff shortages to substandard healthcare. Artificial Intelligence (AI) technologies, including robots and chatbots, have been proposed as solutions to such issues. Yet, socio-ethical concerns about the implications of AI for health and care practices have also been growing among researchers and practitioners. At a time of AI promise and concern, it is critical to understand how those who develop and implement these technologies perceive their use and impact in care homes. Combining a sociological approach to trust with Annemarie Mol's logic of care and Jeanette Pol's concept of fitting, we draw on 18 semi-structured interviews with care staff, advocates, and AI developers to explore notions of human-AI care. Our findings show positive perceptions and experiences of AI in care homes, but also ambivalence. While integrative care incorporating humans and technology was salient across interviewees, we also identified experiential, contextual, and knowledge divides between AI developers and care staff. For example, developers lacked experiential knowledge of care homes' daily functioning and constraints, influencing how they designed AI. Care staff demonstrated limited experiential knowledge of AI or more critical views about contexts of use, affecting their trust in these technologies. Different understandings of 'good care' were evident, too: 'warm' care was sometimes linked to human care and 'cold' care to technology. In conclusion, understandings and experiences of AI are marked by different logics of sociotechnical care and related levels of trust in these sensitive settings., (Copyright © 2024 The Authors. Published by Elsevier Ltd.. All rights reserved.)
- Published
- 2024
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40. A Systematic Review of Artificial Intelligence Models for Time-to-Event Outcome Applied in Cardiovascular Disease Risk Prediction.
- Author
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Teshale AB, Htun HL, Vered M, Owen AJ, and Freak-Poli R
- Subjects
- Humans, Deep Learning, Machine Learning, Risk Assessment methods, Sex Factors, Social Determinants of Health, Heart Disease Risk Factors, Artificial Intelligence, Cardiovascular Diseases epidemiology
- Abstract
Artificial intelligence (AI) based predictive models for early detection of cardiovascular disease (CVD) risk are increasingly being utilised. However, AI based risk prediction models that account for right-censored data have been overlooked. This systematic review (PROSPERO protocol CRD42023492655) includes 33 studies that utilised machine learning (ML) and deep learning (DL) models for survival outcome in CVD prediction. We provided details on the employed ML and DL models, eXplainable AI (XAI) techniques, and type of included variables, with a focus on social determinants of health (SDoH) and gender-stratification. Approximately half of the studies were published in 2023 with the majority from the United States. Random Survival Forest (RSF), Survival Gradient Boosting models, and Penalised Cox models were the most frequently employed ML models. DeepSurv was the most frequently employed DL model. DL models were better at predicting CVD outcomes than ML models. Permutation-based feature importance and Shapley values were the most utilised XAI methods for explaining AI models. Moreover, only one in five studies performed gender-stratification analysis and very few incorporate the wide range of SDoH factors in their prediction model. In conclusion, the evidence indicates that RSF and DeepSurv models are currently the optimal models for predicting CVD outcomes. This study also highlights the better predictive ability of DL survival models, compared to ML models. Future research should ensure the appropriate interpretation of AI models, accounting for SDoH, and gender stratification, as gender plays a significant role in CVD occurrence., (© 2024. The Author(s).)
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- 2024
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41. Neoadjuvant BRAF-targeted therapy for ameloblastoma of the mandible: an organ preservation approach.
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Grynberg S, Vered M, Shapira-Frommer R, Asher N, Ben-Betzalel G, Stoff R, Steinberg Y, Amariglio N, Greenberg G, Barshack I, Toren A, Yahalom R, Schachter J, Rechavi G, Hirschhorn A, and Abebe Campino G
- Subjects
- Humans, Child, Adolescent, Young Adult, Adult, Middle Aged, Aged, Aged, 80 and over, Proto-Oncogene Proteins B-raf genetics, Neoadjuvant Therapy, Retrospective Studies, Organ Preservation, Mutation, Protein Kinase Inhibitors therapeutic use, Mandible, Ameloblastoma drug therapy, Ameloblastoma genetics, Ameloblastoma surgery, Imidazoles, Oximes
- Abstract
Background: Ameloblastoma is a rare odontogenic neoplasm frequently located in the mandible. Standard treatment involves radical bone resection and immediate reconstruction, causing functional, aesthetic, and psychological impairments. The BRAF V600E mutation is present in approximately 80% of mandible ameloblastomas, and BRAF inhibitors have demonstrated sustained responses in unresectable cases., Methods: We identified ameloblastoma patients planned for ablative surgery and screened them for BRAF V600E mutation. Neoadjuvant BRAF inhibitors were offered to facilitate jaw preservation surgery. Retrospective data collection encompassed treatment regimens, tolerability, tumor response, and conversion to mandible preservation surgery., Results: Between 2017 and 2022, a total of 11 patients received dabrafenib (n = 6) or dabrafenib with trametinib (n = 5). The median age was 19 (range = 10-83) years. Median treatment duration was 10 (range = 3-20) months. All (100%) patients achieved a radiological response. Ten (91%) patients successfully converted to mandible preservation surgery with residual tumor enucleation. One patient attained complete radiological response, and surgery was not performed. Among the 10 surgically treated patients, all exhibited a pathological response, with 4 achieving near complete response and 6 partial response. At a median follow-up of 14 (range = 7-37) months after surgery, 1 case of recurrence was observed. Grade 1-2 adverse effects were reported in 8 (73%) patients, with a single case of grade 3 (hepatitis). Dose modification was necessary for 3 patients, and 4 experienced treatment interruptions, while 1 patient permanently discontinued therapy., Conclusions: Neoadjuvant BRAF inhibition may offer a safe and effective strategy for organ preservation in mandible ameloblastoma treatment., (© The Author(s) 2023. Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oup.com.)
- Published
- 2024
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42. The effect of post-COVID-19 on gustatory and olfactory function: A preliminary case-controlled study.
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Livni D, Grinstein-Koren O, Zlotogorski-Hurvitz A, Reiter S, Winocour-Arias O, Edel J, Goldman Y, Vered M, Choshen G, Rahamim-Cohen D, Shapiro-Ben David S, and Kaplan I
- Subjects
- Humans, Female, Male, Case-Control Studies, Middle Aged, Adult, Aged, Anosmia etiology, SARS-CoV-2, Smell physiology, Post-Acute COVID-19 Syndrome, COVID-19 complications, Olfaction Disorders etiology, Taste Disorders etiology
- Abstract
Aims: The aim of the study was to analyze objective and subjective olfactory/gustatory function in post-COVID-19 infection (PCI)., Materials and Methods: Patients with past PCR-confirmed COVID-19 infection and persistent olfactory/gustatory complaints were investigated. Olfactory threshold and identification, gustatory detection, identification, and magnitude scaling were tested., Results: A total of 42 PCI subjects were compared to 41 age- and gender-matched controls with no COVID-19 history. All PCI tested had mild COVID-19 disease. Mean interval between COVID-19 confirmations to testing was 7.4 ± 3.1 months. PCI subjects complained of combined dysfunction in 85.7%, isolated olfactory or gustatory dysfunction in 7.1% each. Combined complaints were significantly higher in PCI (p < 0.001). Objective testing showed significantly higher prevalence of dysfunction in PCI versus controls for hyposmia (73.8%, 12.2%), anosmia (11.9%, 0%), odor identification (68.5%, 83.0%), hypogeusia (23% and 2.4%, respectively), and impaired magnitude scaling, (p < 0.05). All PCI subjects with hypogeusia had abnormal gustatory magnitude scaling., Conclusions: While most PCI subjects complained of combined gustatory and olfactory dysfunction, objective testing showed in the majority an isolated single sense dysfunction, with a low level of agreement between subjective and objective findings. Abnormal objective results for all olfactory and gustatory functions tested may suggest a central rather than peripheral mechanism, although concomitant mechanisms cannot be excluded., (© 2023 Wiley Periodicals LLC.)
- Published
- 2024
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43. Pathological changes in oral epithelium and the expression of SARS-CoV-2 entry receptors, ACE2 and furin.
- Author
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Grinstein-Koren O, Lusthaus M, Tabibian-Keissar H, Kaplan I, Buchner A, Ilatov R, Vered M, and Zlotogorski-Hurvitz A
- Abstract
Background: Expression of angiotensin-converting enzyme (ACE)-2 and co-factors like furin, play key-roles in entry of SARS-CoV-2 into host cells. Furin is also involved in oral carcinogenesis. We investigated their expression in oral pre-malignant/malignant epithelial pathologies to evaluate whether ACE2 and furin expression might increase susceptibility of patients with these lesions for SARS-CoV-2 infection., Methods: Study included normal oral mucosa (N = 14), epithelial hyperplasia-mild dysplasia (N = 27), moderate-to-severe dysplasia (N = 24), squamous cell carcinoma (SCC, N = 34) and oral lichen planus (N = 51). Evaluation of ACE2/furin membranous/membranous-cytoplasmic immunohistochemical expression was divided by epithelial thirds (basal/middle/upper), on a 5-tier scale (0, 1-weak, 1.5 -weak-to-moderate, 2-moderate, 3-strong). Total score per case was the sum of all epithelial thirds, and the mean staining score per group was calculated. Real time-polymerase chain reaction was performed for ACE2-RNA. Statistical differences were analyzed by One-way ANOVA, significance at p<0.05., Results: All oral mucosa samples were negative for ACE2 immuno-expression and its transcripts. Overall, furin expression was weakly present with total mean expression being higher in moderate-to-severe dysplasia and hyperplasia-mild dysplasia than in normal epithelium (p = 0.01, each) and SCC (p = 0.008, p = 0.009, respectively)., Conclusions: Oral mucosa, normal or with epithelial pathologies lacked ACE2 expression. Furin was weak and mainly expressed in dysplastic lesions. Thus, patients with epithelial pathologies do not seem to be at higher risk for SARS-CoV-2 infection. Overall, results show that oral mucosae do not seem to be a major site of SARS-CoV-2 entry and these were discussed vis-à-vis a comprehensive analysis of the literature., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2024 Grinstein-Koren et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
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- 2024
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44. Stromal Cells Associated with Soft Tissue Augmentation by a Volume-Stable Collagen Matrix (VCMX) Are Predominated by Anti-inflammatory/Reparative Macrophages.
- Author
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Artzi Z, Vered M, Maymon-Gil T, Renert U, Netanely E, and Thoma DS
- Subjects
- Humans, Animals, Male, Female, Swine, Middle Aged, Fibroblasts, Antigens, CD, Antigens, Differentiation, Myelomonocytic metabolism, Endothelial Cells, Adult, Immunophenotyping, Mouth Mucosa pathology, Receptors, Cell Surface metabolism, Aged, CD163 Antigen, Macrophages immunology, Collagen, Stromal Cells
- Abstract
This article defines immunophenotypes of stromal inflammatory and endothelial cells and fibroblasts 3 months after augmentation of the peri-implant soft tissue using a porcine cross-linked collagen matrix (VCMX). Peri-implant soft tissue samples were obtained from 12 patients at the lining mucosa (LM)-masticatory mucosa (MM) junction before (1) and 3 months after (2) augmentation. Immu- nohistochemical stains were performed to identify inflammatory cells (T [CD3] and B [CD20] lym- phocytes, plasma cells [CD138]), macrophages (CD68-proinflammatory, CD163-anti-inflammatory/ reparative), endothelial cells (CD31, CD34), and fibroblasts (CD90, TE-7). Differences in the mean positively stained cells pre- and postaugmentation were analyzed by Wilcoxon signed-rank test. CD31+ endothelial cells showed increased mean numbers in MM2 compared to MM1 (P = .025) and in LM2 compared to LM1 (P = .047). CD163+ anti-inflammatory macrophages showed higher mean numbers in MM2 than in MM1 (P = .021) and in LM2 than in LM1 (P = .012). All other cell phenotypes showed nonsignificant changes between pre- and postaugmentation. This molecular study provides novel insight on the frequency of stromal cell phenotypes in the wound healing process at 3 months postaugmentation with VCMX, with anti-inflammatory CD163+ macrophages being predominant. This should be further investigated to help find novel therapeutic approaches to modulate and promote the VCMX-related healing process.
- Published
- 2024
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45. Oral erythroplakia and oral erythroplakia-like oral squamous cell carcinoma - what's the difference?
- Author
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Öhman J, Zlotogorski-Hurvitz A, Dobriyan A, Reiter S, Vered M, Willberg J, Lajolo C, and Siponen M
- Subjects
- Humans, Female, Aged, Male, Squamous Cell Carcinoma of Head and Neck pathology, Retrospective Studies, Mouth Mucosa pathology, Leukoplakia, Oral, Mouth Neoplasms pathology, Carcinoma, Squamous Cell diagnosis, Carcinoma, Squamous Cell pathology, Mouth Diseases, Erythroplasia diagnosis, Erythroplasia pathology, Erythroplasia surgery, Oral Ulcer pathology, Head and Neck Neoplasms pathology, Precancerous Conditions pathology
- Abstract
Background: Oral erythroplakia (OE) is a rare oral potentially malignant disorder, that has a high rate of malignant transformation. The definition of OE still lacks uniformity. In particular, lesions that look clinically like erythroplakias, but are histopathologically diagnosed as squamous cell carcinomas are still sometimes called erythroplakias. The purpose of this study is to present demographic and clinicopathologic features of a series of OEs and clinically oral erythroplakia -like squamous cell carcinomas (OELSCC), to study their differences and to discuss the definition of OE., Methods: A multicenter retrospective case series of OEs and OELSCCs. Descriptive statistics were used to analyze the data., Results: 11 cases of OEs and 9 cases of OELSCCs were identified. The mean age of the OE patients was 71 years and 72.7% were female, while the mean age of the OELSCC patients was 69 years, and all were female. 9% of the OE and 22% of the OELSCC patients had smoked or were current smokers. 72.7% of the OEs and 55.5% of OELSCCs were uniformly red lesions. 63.6% of the OE and 22% of the OELSCC patients had a previous diagnosis of oral lichenoid disease (OLD). The malignant transformation rate of OE was 9% in a mean of 73 months., Conclusions: OE and OELSCC may arise de novo or in association with OLD. Tobacco and alcohol use were not prevalent in the present cases. The clinical features of OEs and OELSCC are similar, but symptoms, uneven surface and ulceration may be more common in OELSCCs than in OEs. Clinical recognition of OE is important since it may mimic other, more innocuous red lesions of the oral mucosa. The diagnosis of OE requires biopsy and preferably an excision. Clarification of the definition of OE would aid in clinical diagnostics., (© 2023. The Author(s).)
- Published
- 2023
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46. Histopathological and histomorphometric analysis of glandular odontogenic cyst-A diagnostic aid.
- Author
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Heiliczer S, Shmuly T, Avishai G, Zlotogorski-Hurvitz A, Vered M, Mamber L, and Kaplan I
- Subjects
- Male, Female, Humans, Mandible pathology, Odontogenic Cysts diagnosis, Odontogenic Cysts pathology
- Abstract
Objectives: Compare recognized microscopic parameters, including variations in width, plaque-like thickenings, intra-epithelial microcysts, clefts, mucous, hob-nail, ciliated and clear cells, between glandular odontogenic cyst (GOC) and GOC-like cysts, investigate the extent of cyst circumference exhibiting these features, and inflammation., Materials and Methods: Archival records of cysts with histological features of GOC evaluated between 2000 and2020 were retrieved. Slides were revised, and the expression of features throughout the cyst wall was analyzed. Cysts with at least 5 features were classified as GOC, cysts with 3-4 features as GOC-like., Results: The study included 74 cysts, 47 males M, 25 females (2 unknown gender), aged 19-81 years, 62 (83.8%) GOC, 12 (16.2%) GOC-like. Mandible was involved in 44 (59.5%), maxilla in 30 (40.5%), 18 (25%) were associated with unerupted teeth. Cyst classified as GOC had significantly higher rates of all parameters investigated, (except ciliated and clear cells), than GOC-like cysts (p ≤ 0.05). 26 (40.6%) cases showed GOC features in >50% of cyst circumference, 21 (32.8%) involved 25-50%, 17 (26.6%) <25%. More than 50% circumference involvement was highly and independently predictive for a diagnosis of GOC, <25% was highly and independently predictive for GOC-like (p = 0.003). Hobnail cells (p = 0.008) and plaque-like thickenings (p = 0.038) were significantly more frequent in inflamed cysts., Conclusion: Besides the number and type of histological features, GOC can be characterized by their distribution within the cyst circumference (focal Vs diffuse), and it may serve as a new diagnostic aid. It is suggested that GOC and GOC-like may represent a single spectrum., (© 2022 Wiley Periodicals LLC.)
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- 2023
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47. The profile of chronic hyperplastic candidiasis: a clinico-pathological study.
- Author
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Winocur-Arias O, Zlotogorski-Hurvitz A, Ben-Zvi Y, Chaushu G, Edel J, Vered M, and Kaplan I
- Subjects
- Humans, Retrospective Studies, Leukoplakia, Hyperplasia, Cell Transformation, Neoplastic pathology, Candidiasis, Oral drug therapy, Candidiasis, Oral pathology, Carcinoma, Head and Neck Neoplasms
- Abstract
The aims of this study were investigation of clinical presentation, systemic factors, and long-term malignant transformation rate in chronic hyperplastic candidiasis versus leukoplakia. This is a retrospective case-controlled study of cases with chronic hyperplastic candidiasis and leukoplakia without dysplasia, diagnosed between 2000 and 2013. A database was created, and all additional biopsies from the same cases were searched up to 2022, for records of oral malignant transformation. Associations between microscopic diagnoses and clinical features of lesions and clinical outcomes of patients were performed. A study database included 116 patients, allocated to the group diagnosed with chronic hyperplastic candidiasis (CHC-group, 62) and to the group of leukoplakia without dysplasia (LKP-group, 54). Tongue and buccal mucosa were most frequently recorded in both groups. In CHC-group, significantly fewer cases presented as white lesions compared to LKP-group (P < 0.001); more were ulcerated or exophytic (P = 0.006 and P = 0.003, respectively). History of head and neck malignancy was significantly more frequent in CHC-group (P = 0.005), as were chemotherapy, (P = 0.019) radiotherapy (P = 0.0265), and immune-related conditions (P = 0.03). Within the follow-up period (2000-2022), in CHC-group, two cases (3.2%) had malignant transformation at the site of original biopsy, one was recurrence of previous carcinoma. In LKP-group, two cases (3.7%) had newly diagnosed carcinoma and one at the site of original biopsy; no significant differences were found between groups. In conclusion, medical background of immune-related conditions, head and neck malignancy, radiotherapy, and chemotherapy may play a role in predisposing for chronic hyperplastic candidiasis. Malignant transformation rate within CHC-group was low, and similar to that within LKP-group, representing a lower transformation rate than expected., (© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
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- 2023
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48. Artificial Intelligence in Long-Term Care: Technological Promise, Aging Anxieties, and Sociotechnical Ageism.
- Author
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Neves BB, Petersen A, Vered M, Carter A, and Omori M
- Subjects
- Humans, Aged, Artificial Intelligence, Aging, Anxiety, Long-Term Care, Ageism
- Abstract
This article explores views about older people and aging underpinning practices and perceptions of development and implementation of Artificial Intelligence (AI) in long-term care homes (LTC). Drawing on semi-structured interviews with seven AI developers, seven LTC staff, and four LTC advocates, we analyzed how AI technologies for later life are imagined, designed, deployed, and resisted. Using the concepts of "promissory discourse" and "aging anxieties", we investigated manifestations of ageism in accounts of AI applications in LTC. Despite positive intentions, both AI developers and LTC staff/advocates engaged in simplistic scripts about aging, care, and the technological capacity of older people. We further uncovered what we termed sociotechnical ageism -a form that is not merely digital but rests on interacting pre-conceptions about the inability or lack of interest of older people to use emerging technologies coupled with social assumptions about aging, LTC, and technological innovation.
- Published
- 2023
- Full Text
- View/download PDF
49. The Anti-Tumorigenic Role of Cannabinoid Receptor 2 in Non-Melanoma Skin Cancer.
- Author
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Iden JA, Raphael-Mizrahi B, Naim A, Kolomansky A, Liron T, Neumann D, Vered M, and Gabet Y
- Subjects
- Animals, Mice, 9,10-Dimethyl-1,2-benzanthracene toxicity, Carcinogenesis genetics, Carcinogenesis pathology, Carcinogens toxicity, Receptors, Cannabinoid, Skin pathology, Tetradecanoylphorbol Acetate toxicity, Tumor Microenvironment, Papilloma pathology, Skin Neoplasms chemically induced, Skin Neoplasms genetics, Skin Neoplasms pathology
- Abstract
Five million non-melanoma skin cancers occur globally each year, and it is one of the most common malignant cancers. The dysregulation of the endocannabinoid system, particularly cannabinoid receptor 2 (CB2), is implicated in skin cancer development, progression, and metastasis. Comparing wildtype (WT) to systemic CB2 knockout (CB2
-/- ) mice, we performed a spontaneous cancer study in one-year old mice, and subsequently used the multi-stage chemical carcinogenesis model, wherein cancer is initiated by 7,12-dimethylbenz[a]anthracene (DMBA) and promoted by 12-O-tetradecanoylphorbol-13-acetate (TPA). We found that aging CB2-/- mice have an increased incidence of spontaneous cancerous and precancerous skin lesions compared to their WT counterparts. In the DMBA/TPA model, CB2-/- developed more and larger papillomas, had decreased spontaneous regression of papillomas, and displayed an altered systemic immune profile, including upregulated CD4+ T cells and dendritic cells, compared to WT mice. Immune cell infiltration in the tumor microenvironment was generally low for both genotypes, although a trend of higher myeloid-derived suppressor cells was observed in the CB2-/- mice. CB2 expression in carcinogen-exposed skin was significantly higher compared to naïve skin in WT mice, suggesting a role of CB2 on keratinocytes. Taken together, our data show that endogenous CB2 activation plays an anti-tumorigenic role in non-melanoma skin carcinogenesis, potentially via an immune-mediated response involving the alteration of T cells and myeloid cells coupled with the modulation of keratinocyte activity.- Published
- 2023
- Full Text
- View/download PDF
50. Preoperative MRI for oral tongue squamous cell carcinoma: timing and correlation to histopathology.
- Author
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Rozendorn N, Greenberg G, Madgar O, Gluck I, Vered M, Alon E, and Dobriyan A
- Subjects
- Humans, Squamous Cell Carcinoma of Head and Neck, Retrospective Studies, Neoplasm Staging, Magnetic Resonance Imaging methods, Tongue Neoplasms diagnostic imaging, Tongue Neoplasms surgery, Tongue Neoplasms pathology, Carcinoma, Squamous Cell diagnostic imaging, Carcinoma, Squamous Cell surgery, Carcinoma, Squamous Cell pathology, Head and Neck Neoplasms pathology
- Abstract
Magnetic resonance imaging (MRI) is an integral part of the evaluation of local and regional disease in tongue squamous cell carcinoma prior to surgery. The aim of this study was to evaluate the accuracy of MRI in assessing tumour dimensions, as well as the impact of the time-lag from diagnostic biopsy on the accuracy of MRI. The medical records of 64 patients with tongue carcinoma were reviewed retrospectively. Tumour maximum diameter and tumour depth of invasion were compared between pathology and MRI (T1- and T2-weighted). MRI-derived maximum tumour diameter and depth of invasion correlated strongly with histopathology: T1-weighted (r = 0.700 and r = 0.813, respectively) and T2-weighted (r = 0.734 and r = 0.834, respectively). A significant correlation was found between measurements on T1 and T2 MRI for both parameters (P = 0.955 and P = 0.984, respectively). The accuracy rate of MRI for T-staging of early tumours was low: 10% for T1 tumours; 39.3% for T2 tumours. A time-lag of less than 2 weeks between the diagnostic biopsy and MRI adversely affected the correlation of tumour dimensions. MRI is a reliable tool for evaluating tongue carcinoma; however, it overestimates early tumours. A 2-week delay after diagnostic biopsy is desired before completing an MRI. Alternatively, if logistics allow, a pre-biopsy MRI is preferred, especially for T1-T2 tumours., (Copyright © 2022 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.)
- Published
- 2023
- Full Text
- View/download PDF
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