23 results on '"Aydın Sav"'
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2. Effects of Decompressive Surgery on Prognosis and Cognitive Deficits in Herpes Simplex Encephalitis
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Ipek Midi, Nese Tuncer, Ahmet Midi, Aynur Mollahasanoglu, Deniz Konya, and Aydın Sav
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Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Published
- 2007
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3. Modulation of extracellular matrix proteins and hepatate stellate cell activation following gadolinium chloride induced Kuffer cell blockade in an experimental model of liver fibrosis/cirrhosis
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Nilgün Tekkesin, Yaz Taga, Aydın Sav, and Süheyla Bozkurt
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General Works - Abstract
Hepatic fibrosis is now regarded as a common response to chronic liver injury; regardless of its nature (viral infections, alcohol abuse and metal overload). It is also characterized by excessive deposition of extracellular matrix (ECM) components. The ECM is a dynamic complex of macromolecules that includes collagens, glycoproteins, and proteoglycans, such as laminin and fibronectin; it has been shown that it does not only support the tissue structure, but also plays a major role in cell adhesion, proliferation, and differentiation. Remodelling of the ECM may be the signal that facilitates lobular reorganization during liver regeneration after a liver injury. Much work has been done concerning the ECM synthesis and protein contents.
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- 2013
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4. Kafa Travmalarında Diffüz Akson Zararı Tanıda B-App’nin Yeri
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Ferah Karayel and Aydın Sav
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travma ,beyin ,diffüz akson zararı ,ß-app ,Medicine (General) ,R5-920 - Abstract
Farklı derecelerde kafa travması geçirmiş olan kişilerde ölümün ya da uzamış nörolojik defisitlerin en önemli nedenlerinden biri diffüz akson zararıdır (DAZ). Otopsi olgularında DAZ’ın tanısı beynin uygun bölgelerinden alınacak örneklerde Hematoksilen Eozin ile boyanmış kesitlerin mikroskopik incelenmesi ile mümkündür. Ancak, posttravmatik dönemde çok kısa süre yaşamış olan olgularda zararın morfolojik bulguları tam oluşmadığından bu olgularda DAZ’ın tanınması zordur. ß-APP bu tür olgularda DAZ’in tanınabilmesinde önemli rol oynamaktadır. Canlı iken gerçekleşmiş olan zararı yansıtması, sadece zarar görmüş aksonları işaretlemesi ve postmortem in-tervalden etkilenmemesi en önemli üstünlükleridir. Çalışmanın amacı, DAZ’ın oluş mekanizması ile morfolojik bulgularını gözden geçirmek, kafa travması geçirmiş olguların değerlendirilmesinde ß-APP’nin rolü ve önemini vurgulamaktır. Anahtar kelimeler: Travma, beyin, diffüz akson zararı, ß-APP
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- 2008
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5. Adli Otopsilerde Santral Sinir Sistemi Enfeksiyonu Saptanan Olguların Değerlendirilmesi
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Ferah Karayel, Işıl Pakiş, Aydın Sav, Arzu Akçay Turan, and Gürsel Çetin
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santral sinir sistemi enfeksiyonları ,otopsi ,Medicine (General) ,R5-920 - Abstract
Amaç Çalışmada amacımız, retrospektif olarak santral sinir sistemi enfeksiyonlarının histopatolojik özelliklerini literatür bilgileri ışığında değerlendirmektir. Gereç- Yöntem 1998-2002 yıllarında Adli Tıp Kurumu Morg İhtisas Dairesinde otopsileri yapılan ve santral sinir sistemi enfeksiyonu saptanan 103 olgu çalışmaya alındı. Olgularımız yaş, cinsiyet, ölüm nedenleri (doğal ve travmaya bağlı ölümler) ve beyinde saptanan enfeksiyonun histopatolojik özellikleri açısmdan değerlendirildi. Bulgular Çalışmaya alman 103 olgunun %50,4’ü doğal, %49,6’sı travmaya bağlı gelişen komplikasyonlar sonucunda ölen olgulardı. Olgularımızın 85’i (%83,3) erkek, 18’i (%16,6) kadındı. Histopatolojik olarak, toplam 73 olguda (%70,87) menenjit saptandı. Bu grupta 60 olgu (%58,25) akut piyojenik (bakteryel) menenjit, 8 olgu (%7,76) akut aseptik (viral) menenjit, 5 olgu (%4,85) granülomatöz menenjit olarak değerlendirildi. Granülomatöz menenjit olgularından birinde (%20) beyin sapı tutulumuntın da eşlik ettiği nokardia enfeksiyonu, dördünde (%80) tüberküloz enfeksiyonu saptandı. 19 olguda (%18,44)ensefalit saptandı. Bu grupta 8 olgu nonspesifik ensefalit (%7,76), 5 olgu (%4,85) kuduza bağlı viral ensefalit, 1 olgu (%0,97) HlV’e bağlı ensefalit, 1 olgu (%0,97) progresif mültifokal lökoensefalopati, 4 olgu (%3,88) Prion hastalığı (Jacob-Creutzfeld) olarak değerlendirildi. Serimizde 3 olguda (%2,91) meningoensefalit , 6 olguda (%5,82) beyin absesi, 2 olguda da (% 1,94) non-spesifik serebrit tespit edildi. Sonuç Santral sinir sisteminde enfeksiyon hastalıklarının patolojisi oldukça karmaşık ve sıklıkla birbirleriyle örtüşen tabloları içermektedir. Sonuç olarak, enfeksiyon hastalıklarının patolojisinde mültidisipliner bir laboratuar araştırma yapılması gerekmektedir. Anahtar kelimeler: Santral sinir sistemi enfeksiyonları, otopsi
- Published
- 2004
6. Türk Patolojisinde Bir Okul Prof Dr Talia Bali Aykan 13 Ağustos 1918 - 31 Ağustos 2003
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Aydın Sav
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Medicine (General) ,R5-920 - Abstract
Aydın SAV Ege Üniversitesi mezunu bir doktor olarak, öğrenciliğimde bana patoloji dalını sevdirmiş hocalarımı ardımda bırakıp, bu alanda uzmanlık eğitimimi yapmak üzere birçok kapıyı çaldıktan soma ilk defa 1980 yılında “Talia Hoca”yla karşılaştım. Bu ilk mülakatımızda, beni dinleyip merakla bu mesleği neden seçtiğimi sormasıyla “mikroskobun içinden bir mikrofon sarkıtıp hücrelerle röportaj yapmak istediğim için” dediğimi hatırlıyorum. Hoca bana dönüp “İstanbul'da bir kalacak yerin var mı?” sorusuna olumlu yanıt verdikten sonraa, ertesi günü gönüllü olarak Cerrahpaşa Tıp Fakültesi Patoloji Anabilim'de göreve başladım. Çok kısa bir süre sonraa hocamın asistan kadrosu açmasıyla sınavı geçip resmi asistanlık statümü kazandım. O günden 31 Ağustos 2003'e kadar tam tamına yirmi üç yıl geçti. Uzmanlık eğitimimi izleyen yıllarda da kesintisiz bir işbirliğiyle birlikte sonunda dostluğa dönüşen yolculuğumuz halen bütün canllılığı ve verimiyle devam ediyordu. Ta ki... 31 Ağustos 2003 Pazar günü Çanakkale, Küçükkuyu beldesinin bir tatil tesisinde denizde yüzerken bu yıldız aramızdan ayrıldı. Türkiye Cumhuriyetine kanat geren bir bilimci, “hoca”, dost ve “insan” Prof. Dr. Talia Bali Aykan. 1918 yılında İstanbul'un Beylerbeyi'nde başlayan ve yaşamının tamamım düşünmeye, araştırmaya, eğitime, anlamaya ve anlatmaya adamış olan hocam seksenbeş yıllık bir ömrün ardından, binlerce paylaşılmış anı, eser ve belge bırakarak ayrıldı aramızdan. Hocamı tanıdıkça, daha çok hayret, daha çok hayranlık ve hepsinden önemlisi daha çok saygı duydum. Başlarda bilimsel kişiliği ve yaklaşımları dikkatimi çekmişti. Giderek de mesleğini ve dünyayı makro planda ve son derece ciddiyet ve cesaretle ele alarak değerlendiren kişiliği. Tüm yaşamını, ülkeme nasıl hizmet ederim? Yapılan bu iş ülkenin yararına mıdır? Nasıl yapılırsa yararına olur? Sorularına cevap vererek, tartarak tartışarak ve uygulayarak geçirdi. Talia Hoca'nın düşünceleri ve uygulamaları boyları ve çapları her zaman ülkenin çıkarları doğrultusundaydı. Hocam, tıp biliminin kuramcısı, uygulayıcısı, tartışmacısı ve paylaşımcısıydı. Kişiliğinin bir başka yönünü de ilk defa asistanlığım sırasında, ki 12 Eylül 1980'ün hemen ardıdır, farkına vardım. O zamana kadar kimsesiz ve sahipsiz cenazelerin otopsilerini “kürsü”müzde (YÖK sonrası anabilim olarak isimlendirildi) yapardık. Otopsinin tıp fakültesi öğrenci eğitiminde olduğu kadar uzmanlık eğitimi, sürekli tıp eğitimi ve ulusal sağlık istatistiklerinde yeri olduğunu da böylece öğrenirdik. Ancak, 12 Eylül dönemin askeri idarecileri, bazı meslekdaşlarmızdan aldıkları akıl doğrultusunda, kimsesiz ve sahipsiz bu cenazelerin, patoloji disiplin ince otopsi yapmalarım engelleyerek başka bir bilim dalında eğitim amacıyla kullanılmasını sağlayan yeni kanuni bir düzenleme yapıp uygulamaya koydular. Hocamın, bu olay nedeniyle önce öfkelenip, daha soma akılcı bir yöntemle ele alıp ve karşı tavır koyarak mücadeleye başlamasıyla, kişiliğinin ödünsüz ve ardıcıl mücadeleci tarafım görmeye başladım. Çünkü, otopsisiz tıp: hakemsiz maç, eleştirmensiz sanat, yargıçsız adalet ve sınavsız eğitimdi. Uzun yıllar bakanlık, rektörlük, dekanlık, YÖK, yazık basm, kişisel görüşmelerle mücadelesini sürdürdü. Talia Hocanın biyografisini oluşturan unsurları arka arkaya yazdığımızda ilk bakışta görünmeyen, ancak satır aralarında binlerce küçüklü büyüklü mücadele örnekleri, acılar, sıkıntılar, dostluklar, hüzünler saklıdır (1). Buna yakınları, dostları, paylaşanları ve inananları tanıktır. Yurtdışı deneyimini tamamlayıp ülkesine döndüğünde, eski deyişiyle “vazife mukaddestir” anlayışıyla ülkemizin gereksinmelerine yönelik patoloji eğitiminin esaslarım kurma, otopsi ağırlıklı eğitim, bu amaca yönelik ders kitaplarının esaslarım kurmak üzere pratik ve teorik teksirler hazırlamayı görev bilmiştir. Bu amacına ulaşmak için 1967 yıhnda kurulan Cerrahpaşa Tıp Fakültesi bünyesindeki Genel Patoloji ve Patolojik Anatomi Kürsüsü'nün temellerini atmıştır. 1980 yılında hocamın kürsüsünde asistanlığa başladığımda, deneysel patoloji (hayvan odası ve doku kültürü), otopsi patolojisi (patoloji anatomi) ve cerrahi patoloji bölümleri tasarlanmış, planlanmış ve çalışmaktaydı (2). Tüm bu gözlemlerinden çıkardığım sonuç ise, hocamın aklı, görgüsü, deneyimi ve hedefleri, olayları, gerçekleri ve gereksinmeleri “makro” planda ele alarak değerlendirip, uygulayabilme beceri, inanç ve gücünden gelmesiydi. 3 Eylül 2003 Çarşamba günü, İstanbul Üniversitesi Cerrahpaşa Tıp Fakültesinde kendisi için yapılan resmi törende, Taha Hoca'nın ardından güzel sözler söyleyen ve göz yaşı dökenlerin hemen tamamı, devrimci, mücadeleci, bilimci, akıllı ve akılcı, Cumhuriyet kadını, “öğretmen”, anne ve babaanneye ve hepsinden önemlisi “örnek bir insan”a Tanrı'dan rahmet dilediler. Dönüp salona baktığımda her yaştan, kuşaktan ve görgüden gelen insanların yüzlerindeki ve sözlerindeki enerji, inanç ve ateş, Prof. Dr. Bülent Berkarda Hoca'nm deyimiyle “toplumlarm kaçınılmaz olarak yapılması gereken bir görev olarak bu tür toplantılara, toplumumuzun özellikle zor günlerinde gereksindiği birliktelik, güçbirhği ve paylaşım” hedefini sonuna kadar destekliyordu. Aydınlıklar içinde yat Hocam... 1. Nusret Erdoğan: Prof. Dr. Talia Bali Aykan'ın Biyografisi.Taksim Eğitim ve Araştırma Hastanesi Tıp Dergisi. 1999;29:3. 2. Prof. Dr Talia Balı Aykan. Patoloji. Dünyada ve Türkiye'de 1850 yılından sonra tıp tarihindeki ilerlemelerin tarihi. Editör: Prof. Dr. Ekrem Kadri Unat. Cerrahpaşa Tıp Fakültesi Yayınları, no.4, 1988, 344-355.
- Published
- 2003
7. Beyinde Vasküler Malformasyona Bağlı Kanama Nedeni ile Ani Ölen Üç Olgu Sunumu
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Işıl Pakiş, Arzu Akçay Turan, Ferah Karayel, Aydın Sav, and Gürsel Çetin
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arteriyovenöz malformasyon ,ani ölüm ,otopsi ,Medicine (General) ,R5-920 - Abstract
Santral sinir sisteminde görülen damar anomalileri; beyindeki damarlanma bozuklukları sonucu oluşurlar ve otopsilerde tesadüfen saptanan küçük lezyonlardan, öldürücü kafa içi kanamalara neden olan büyük lezyonlara kadar farklı şekillerde görülebilirler. Çalışmamızda 1998-2003 yılları arasında Adli Tıp Kurumu Morg İhtisas Dairesinde ani ölüm nedeni ile otopsileri yapılan ve ölüm nedeni beyinde vasküler malformasyona bağlı subaraknoidal ve intraserebral kanama olarak değerlendirilen üç olgu ele alındı. Olgularımızın yaşları 16-29 arasında olup, ikisi erkek, biri kadındı. Makroskopik incelemede, beyin ve beyincik kıvamında yumuşama, lgulardan birinde sağ parietal lob yerleşimli, diğer ikisinde de beyincik ve beyin sapı yerleşimli parankim içi, intraventriküler ve subaraknoidal kanama alanları saptandı. Mikroskopik incelemede, beyin parankimi içinde yerleşmiş birbirleri ile ilişkili ve kıvrıntılı sırt sırta vermiş damar yapıları izlenmekteydi. Damarların bir kısmı ince duvarlı ve venöz yapıda olmakla birlikte, çoğu özellikleri seçilemeyen (ambigious) damarsal yapılardan oluşmaktaydı. Damarlar arasında nöral doku seçilebilmekteydi. Makroskopik ve mikroskopik bulgular eşliğinde olguların ikisi arteriovenöz malformasyon bağlı subaraknoidal ve intraserebral kanama olarak değerlendirildi. Olgularda ölümün vasküler malformasyona bağlı patolojik beyin kanaması sonucu meydana gelmiş olduğu saptandı. Farklı klinik seyir gösteren, bir kısmı ise klinik sessiz kalabilen bu olgular adli tıp pratiğinde ani ölüm nedeni olarak karşımıza çıkabilmektedir. Bu olgu sunumunun amacı nedeni açıkça ortaya konamayan ölüm olgularında sistematik otopsinin tıp ve adalet açısından değerini bir kez daha vurgulamaktır. Anahtar kelimeler: Arteriyovenöz malformasyon, ani ölüm, otopsi
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- 2003
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8. Collagenous Fibroma of the Caruncle: A Rare Pediatric Case
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Lara BİLİCİ, Ayşe Buse MELİK, İlke BAHÇECİ ŞİMŞEK, and Aydın SAV
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General Medicine - Published
- 2023
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9. Letter to the Editor From Kelestimur et al.: 'Hypophysitis, the Growing Spectrum of a Rare Pituitary Disease'
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Ugur Türe, Aydın Sav, and Fahrettin Kelestimur
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Mini-Reviews ,Endocrinology, Diabetes and Metabolism ,Pituitary Diseases ,Biochemistry (medical) ,Clinical Biochemistry ,Biochemistry ,Magnetic Resonance Imaging ,hypophysitis ,IgG4-related hypophysitis ,immunotherapy-induced hypophysitis ,Endocrinology ,Pituitary Gland ,paraneoplastic pituitary-directed autoimmunity ,stalk biopsy ,Humans ,lymphocytic hypophysitis ,Autoimmune Hypophysitis ,AcademicSubjects/MED00250 - Abstract
Hypophysitis is defined as inflammation of the pituitary gland that is primary or secondary to a local or systemic process. Differential diagnosis is broad (including primary tumors, metastases, and lympho-proliferative diseases) and multifaceted. Patients with hypophysitis typically present with headaches, some degree of anterior and/or posterior pituitary dysfunction, and enlargement of pituitary gland and/or stalk, as determined by imaging. Most hypophysitis causes are autoimmune, but other etiologies include inflammation secondary to sellar tumors or cysts, systemic diseases, and infection or drug-induced causes. Novel pathologies such as immunoglobulin G4-related hypophysitis, immunotherapy-induced hypophysitis, and paraneoplastic pituitary-directed autoimmunity are also included in a growing spectrum of this rare pituitary disease. Typical magnetic resonance imaging reveals stalk thickening and homogenous enlargement of the pituitary gland; however, imaging is not always specific. Diagnosis can be challenging, and ultimately, only a pituitary biopsy can confirm hypophysitis type and rule out other etiologies. A presumptive diagnosis can be made often without biopsy. Detailed history and clinical examination are essential, notably for signs of underlying etiology with systemic manifestations. Hormone replacement and, in selected cases, careful observation is advised with imaging follow-up. High-dose glucocorticoids are initiated mainly to help reduce mass effect. A response may be observed in all auto-immune etiologies, as well as in lymphoproliferative diseases, and, as such, should not be used for differential diagnosis. Surgery may be necessary in some cases to relieve mass effect and allow a definite diagnosis. Immunosuppressive therapy and radiation are sometimes also necessary in resistant cases.
- Published
- 2022
10. Meningiomas Display a Specific Immunoexpression Pattern in a Rostrocaudal Gradient: An Analysis of 366 Patients
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Ayça Erşen Danyeli, Ege Ülgen, Pınar Kuru Bektaşoğlu, Deniz Baycin Hizal, M. Necmettin Pamir, Koray Özduman, M. Aydın Sav, and Özge Can
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Adult ,Male ,Pathology ,medicine.medical_specialty ,Adolescent ,CD34 ,Meningioma ,Young Adult ,03 medical and health sciences ,Meninges ,0302 clinical medicine ,Cranial vault ,Progesterone receptor ,Meningeal Neoplasms ,otorhinolaryngologic diseases ,medicine ,Humans ,Aged ,Retrospective Studies ,Aged, 80 and over ,business.industry ,Middle Aged ,medicine.disease ,Immunohistochemistry ,Survival Analysis ,Skull ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Embryology ,Female ,Surgery ,Neurology (clinical) ,business ,030217 neurology & neurosurgery ,Secretory Meningioma ,Follow-Up Studies - Abstract
Background Meningiomas are heterogeneous, with differences in anatomical, histopathological, and clinical characteristics. Such spatial variability in meningioma biology is thought to result from differences in the expression of critical developmental regulators. We hypothesized that the variability in meningioma biology would follow gradients such as in embryology and tested a cohort of 366 meningiomas for histopathological and immunohistochemical gradients. Methods The medical records from 366 patients treated for meningiomas from 2003 to 2016 were retrospectively analyzed for age, gender, anatomical localization, recurrence-free survival, overall survival, histopathological diagnosis, and immunohistochemistry findings for 6 markers: epithelial membrane antigen (EMA), progesterone receptor (PR), CD34, S100, p53, and Ki-67 labeling index. Results EMA, PR, S100, p53, and CD34 were expressed in 94%, 73%, 49%, 26%, and 23% of the tumors, respectively. p53 expression correlated positively with Ki-67 and World Health Organization (WHO) grade (rτ = 0.31 and rτ = 0.4, respectively). PR positivity correlated inversely with S100, p53, Ki-67, and WHO grade (rτ = −0.19, rτ = −0.14, rτ = −0.15, and rτ = −0.16, respectively). All secretory meningiomas were positive for EMA and PR and negative for S100, and this pattern exhibited a rostrocaudal gradient. The overall proportion of EMA+PR+S100− cases was significantly lower in the cranial vault (30.3%) than in the skull base (45.89%; P = 0.021). The proportion of WHO grade II-III tumors was greater in cranial vault than in skull base meningiomas. Conclusions Unsupervised methods detected an association between the anatomical location and tumor biology in meningiomas. Unlike the categorical associations that former studies had indicated, the present study revealed a rostrocaudal gradient in both the cranial vault and the skull base, correlating with human developmental biology.
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- 2019
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11. Primer İntradural Ekstramedüller Lomber Spinal Tüberkülom
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Mehmet Yavuz, Berker Cemil, Aydın Sav, Tuncer Göker, and Kagan Tun
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Pathology ,medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Central nervous system ,Cauda equina ,Magnetic resonance imaging ,General Medicine ,Spinal cord ,Lesion ,medicine.anatomical_structure ,Giant cell ,medicine ,Tuberculoma ,Differential diagnosis ,medicine.symptom ,business - Abstract
Tuberculosis is an important pathological entity in developing countries with increased incidence. Non-osseous spinal cord tuberculomas can be found as extradural, intradural extramedullary, or intramedullary lesions. It has been estimated that intradural spinal tuberculomas comprise only 2–5% of central nervous system tuberculomas. A 31-year-old woman presented with a 2-month history of progressive paraparesis. Magnetic resonance imaging revealed an intradural, extramedullary lesion at L3-S2 levels with high contrast enhancement. Following operation, pathological examination of the lesion revealed granulomas with multinucleated and Langhans-type giant cells, and caseation necrosis typical of a tuberculoma. In the differential diagnosis of cauda equina lesions, primary intradural extramedullary tuberculomas should be considered as a rare entity
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- 2018
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12. IDH-mutant glioma specific association of rs55705857 located at 8q24.21 involves MYC deregulation
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Şirin Yüksel, I. Melis Durası, Sevin Turcan, Murat Gunel, Jason T. Huse, M. Necmettin Pamir, Cemaliye B Akyerli, E. Paolo Nanni, M. Cengiz Yakıcıer, Manu Gupta, Adrienne M. Flanagan, Nathalie Selevsek, M. Aydın Sav, Özge Can, Jonas Grossmann, O. Uğur Sezerman, Aysel Ozpinar, William Lee, E. Zeynep Erson-Omay, Yavuz Oktay, Hanwen Bai, Ege Ülgen, Yigit Erdemgil, Koray Özduman, Octavian Henegariu, Acibadem University Dspace, University of Zurich, and Özduman, Koray
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Rare variants ,Proteome informatics ,Gene regulation ,CNS cancer ,0301 basic medicine ,Adult ,Male ,Proteomics ,Locus (genetics) ,Single-nucleotide polymorphism ,610 Medicine & health ,10071 Functional Genomics Center Zurich ,Kaplan-Meier Estimate ,Biology ,Polymorphism, Single Nucleotide ,Article ,Proto-Oncogene Proteins c-myc ,03 medical and health sciences ,Glioma ,medicine ,Biomarkers, Tumor ,Humans ,Genetic Predisposition to Disease ,Allele ,Enhancer ,Anaplasia ,Gene ,Alleles ,Genetic Association Studies ,Aged ,Genetics ,1000 Multidisciplinary ,Multidisciplinary ,Sequence Analysis, RNA ,Middle Aged ,medicine.disease ,Isocitrate Dehydrogenase ,Neoplasm Proteins ,Gene Expression Regulation, Neoplastic ,030104 developmental biology ,Isocitrate dehydrogenase ,Mutation ,Cancer research ,570 Life sciences ,biology ,Female ,medicine.symptom ,Neoplasm Grading - Abstract
The single nucleotide polymorphism rs55705857, located in a non-coding but evolutionarily conserved region at 8q24.21, is strongly associated with IDH-mutant glioma development and was suggested to be a causal variant. However, the molecular mechanism underlying this association has remained unknown. With a case control study in 285 gliomas, 316 healthy controls, 380 systemic cancers, 31 other CNS-tumors, and 120 IDH-mutant cartilaginous tumors, we identified that the association was specific to IDH-mutant gliomas. Odds-ratios were 9.25 (5.17–16.52; 95% CI) for IDH-mutated gliomas and 12.85 (5.94–27.83; 95% CI) for IDH-mutated, 1p/19q co-deleted gliomas. Decreasing strength with increasing anaplasia implied a modulatory effect. No somatic mutations were noted at this locus in 114 blood-tumor pairs, nor was there a copy number difference between risk-allele and only-ancestral allele carriers. CCDC26 RNA-expression was rare and not different between the two groups. There were only minor subtype-specific differences in common glioma driver genes. RNA sequencing and LC-MS/MS comparisons pointed to significantly altered MYC-signaling. Baseline enhancer activity of the conserved region specifically on the MYC promoter and its further positive modulation by the SNP risk-allele was shown in vitro. Our findings implicate MYC deregulation as the underlying cause of the observed association., Scientific Reports, 6, ISSN:2045-2322
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- 2016
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13. Expression of Growth Factors and Structural Proteins in Chordomas: Basic Fibroblast Growth Factor, Transforming Growth Factor α, and Fibronectin Are Correlated with Recurrence
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M. Levent Deniz, Türker Kılıç, İdil Almaata, Özlem Kurtkaya, Aydın Sav, and M. Necmettin Pamir
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Surgery ,Neurology (clinical) - Published
- 2002
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14. Using intraoperative dynamic contrast-enhanced T1-weighted MRI to identify residual tumor in glioblastoma surgery
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Koray, Özduman, Erdem, Yıldız, Alp, Dinçer, Aydın, Sav, and M Necmettin, Pamir
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Adult ,Male ,Neoplasm, Residual ,Brain Neoplasms ,Monitoring, Intraoperative ,Humans ,Female ,Middle Aged ,Glioblastoma ,Magnetic Resonance Imaging ,Neurosurgical Procedures - Abstract
The goal of surgery in high-grade gliomas is to maximize the resection of contrast-enhancing tumor without causing additional neurological deficits. Intraoperative MRI improves surgical results. However, when using contrast material intraoperatively, it may be difficult to differentiate between surgically induced enhancement and residual tumor. The purpose of this study was to assess the usefulness of intraoperative dynamic contrast-enhanced T1-weighted MRI to guide this differential diagnosis and test it against tissue histopathology.Preoperative and intraoperative dynamic contrast-enhanced MRI was performed in 21 patients with histopathologically confirmed WHO Grade IV gliomas using intraoperative 3-T MRI. Standardized regions of interest (ROIs) were placed manually at 2 separate contrast-enhancing areas at the resection border for each patient. Time-intensity curves (TICs) were generated for each ROI. All ROIs were biopsied and the TIC types were compared with histopathological results. Pharmacokinetic modeling was performed in the last 10 patients to confirm nonparametric TIC analysis findings.Of the 42 manually selected ROIs in 21 patients, 25 (59.5%) contained solid tumor tissue and 17 (40.5%) retained the brain parenchymal architecture but contained infiltrating tumor cells. Time-intensity curves generated from residual contrast-enhancing tumor and their preoperative counterparts were comparable and showed a quick and persistently increasing slope ("climbing type"). All 17 TICs obtained from regions that did not contain solid tumor tissue were undulating and low in amplitude, compared with those obtained from residual tumors ("low-amplitude type"). Pharmacokinetic findings using the transfer constant, extravascular extracellular volume fraction, rate constant, and initial area under the curve parameters were significantly different for the tumor mass, nontumoral regions, and surgically induced contrast-enhancing areas.Intraoperative dynamic contrast-enhanced MRI provides quick, reproducible, high-quality, and simply interpreted dynamic MR images in the intraoperative setting and can aid in differentiating surgically induced enhancement from residual tumor.
- Published
- 2013
15. Congenital pineoblastoma and parameningeal rhabdomyosarcoma: concurrent two embryonal tumors in a young infant.
- Author
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Funda Çorapçíoğlu, M. Memet Özek, Aydın Sav, and Deniz Üren
- Published
- 2006
16. Supratentorial hemangioblastoma without von Hippel-Lindau syndrome in an adult
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Oguz Baran, Omur Kasimcan, Aydin Sav, and Hakan Oruckaptan
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supratentorial ,hemangioblastoma ,von Hippel-Lindau syndrome ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Hemangioblastomas (HBLs) are highly vascular and cystic benign neoplasms. They form very small part of intracranial tumours and are often localized in the posterior fossa. Although most of them are sporadic, a significant group is accompanied with von Hippel-Lindau (VHL) syndrome. This case report presents a 57-year-old woman treated with total resection using micro-surgical technique and was diagnosed as HBL based on histopathologic findings. Contrast-enhanced cranial MRI of the patient with the complaints of spasms in the right side of body showed a right paracentral mass that caused midline shift. In literature, the previously reported cases of supratentorial HBL unaccompanied with VHL syndrome were searched in PUBMED, compiled and presented. It should be borne in mind that rare HBLs manifesting with various neurological symptoms may occur in the supratentorial region, and may not accompany with VHL syndrome.
- Published
- 2019
- Full Text
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17. Purely extradural spinal nerve root hemangioblastomas
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Murat Hamit Aytar, Ulaş Yener, Murat Sakir Ekşi, Behram Kaya, Serdar Özgen, Aydin Sav, and Ahmet Alanay
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Extradural ,hemangioblastoma ,spine ,surgery ,von Hippel–Lindau. ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
Spinal nerve root hemangioblastomas present mostly as intradural-extradurally. Purely extradural spinal nerve root hemangioblastoma is a very rare entity. In this study, we aimed to analyze epidemiological perspectives of purely extradural spinal nerve root hemangioblastomas presented in English medical literature in addition to our own exemplary case. PubMed/MEDLINE was searched using the terms “hemangioblastoma,” “extradural,” “spinal,” and “nerve root.” Demographical variables of age, gender, concomitant presence of von Hippel–Lindau (VHL) disease; spinal imaging and/or intraoperative findings for tumor location were surveyed from retrieved articles. There are 38 patients with purely extradural spinal nerve root hemangioblastoma. The median age is 45 years (range = 24–72 years). Female:male ratio is 0.6. Spinal levels for purely extradural spinal nerve root hemangioblastomas, in order of decreasing frequency, are thoracic (48.6%), cervical (13.5%), lumbar (13.5%), lumbosacral (10.8%), sacral (8.1%), and thoracolumbar (5.4%). Concomitant presence of VHL disease is 45%. Purely extradural spinal nerve root hemangioblastomas are very rare and can be confused with other more common extradural spinal cord tumors. Concomitant presence of VHL disease is observed in less than half of the patients with purely extradural spinal nerve root hemangioblastomas. Surgery is the first-line treatment in these tumors.
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- 2016
- Full Text
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18. Frequency of fetal macrosomia and the associated risk factors in pregnancies without gestational diabetes mellitus
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Akin Usta, Ceyda Sancakli Usta, Ayla Yildiz, Ruhsen Ozcaglayan, Eylem Sen Dalkiran, Aydin Savkli, and Meryem Taskiran
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fetal macrosomia ,weight gain ,gestational diabetes mellitus ,body mass index ,Medicine - Abstract
BACKGROUND: there has been an increased incidence of macrosomic newborns in the world and most of the macrosomic newborns are born from non-GDM pregnant women. The objective of this study was to determine the frequency and the associated risk factors of fetal macrosomia in non-GDM pregnant women. METHODS: a total 4246 consequtive pregnant women who had no GDM was included the study population. Data was collected from hospital database of Bal?kesir State Hospital between January 2014 and January 2015. Statistical analysis was carried out using the independent samples t-test and chi-squared test. Logistic regression analysis was used to determine the relationships between associated risk factors and the presence of fetal macrosomia. In this analysis, fetal macrosomia was taken as the dependent variable and associated risk factors were taken as independent variables. Results are shown as odds ratios (ORs) (95% CI) in the logistic regression analysis. RESULTS: 366 of the 4246 pregnant women were diagnosed with fetal macrosomia (8.6%). Compared the control women, a statistically significant correlation between fetal macrosomia and pre-pregnancy body mass index (BMI), gestational weight gain (GWG), parity, advanced maternal age, and male fetal sex was found. Maternal BMI, and GWG were the two risk factors most strongly associated with macrosomia. CONCLUSION: the prevalance of fetal macrosomia is rising among Turkish women. High pre-pregnancy BMI and GWG represent main modifiable risk factors for macrosomia and need more attention from health care providers.
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- 2017
- Full Text
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19. Intradural Solitary Fibrous Tumor of the Lumbar Spine: A Distinctive Case Report
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Recep Basaran, Mustafa Kaksi, Mustafa Onoz, Ece Balkuv, and Aydin Sav
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Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Background. Solitary fibrous tumors are ubiquitous mesenchymal neoplasms of putative fibroblastic origin. They were originally described in the pleura but subsequently have been reported in many extraserosal sites. Solitary fibrous tumors may also occur in the meninges, central nervous system parenchyma, and spinal cord. Case. A 67-year-old male patient with progressive lower extremity weakness, urinary urgency, and sexual dysfunction has been admitted to our hospital. On his lumbar MRI, we detected an intradural lesion posterior to the L3 vertebral corpus. We resected the lesion by L3 total laminectomy. Immunohistological findings revealed strong and diffuse immunopositivity with vimentin, CD34, and bcl-2. Ki-67 proliferation index was 5–8%. We did not detect any recurrence 12 months after his operation. Conclusion. SFT is mostly seen in young and middle-aged patients and should be considered among differential diagnosis in cases suffering from pain, hypoesthesia, and urinary dysfunction. Gross total resection should be primary treatment. Tumors that have high Ki-67 labeling should be followed up for potential recurrences.
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- 2015
- Full Text
- View/download PDF
20. Monostotic fibrous dysplasia involving occipital bone: a case report and review of literature
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Recep Basaran, Mustafa Kaksi, Erdal Gur, Mustafa Efendioglu, Ece Balkuv, and Aydin Sav
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fibrous dysplasia ,cystic ,cranial ,monostotic ,occipital ,trauma ,Medicine - Abstract
Fibrous dysplasia (FD) is a progressive systemic bone tumour of young and it can be seen on cranial bones. FD is divided into three types according to radiological features. The second most common subtype is polyostotic subtype. With this article, we aimed to review and present clinical features, radiological examination, differential diagnosis and treatment management of a case of solitary monostotic fibrous dysplasia of occipital bone. 15 years old female patient admitted to our hospital for a bump and in the back of his head that she noticed 1 month ago. Her physical and neurological examination was normal. On cranial CT examination we detected a bony defect. Her gadolinium enhanced cranial MRI revealed bony defect along with massive gadolinium enhancement in adjacent tissue. On histopathologic examination; PANCK, CD68, CD1a were found negative and CD45, S-100, Vimentine were found positive. Ki-67 was 4,8%. In conclusion, fibrous dysplasia is a progressive bone disease of the young patients. Despite its resemblance to a benign lesion by not being symptomatic it can progress and cause severe bony defects and skin lesions. Total surgical resection is necessary and sufficient for total treatment.
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- 2014
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21. Spinal Intramedullary Metastasis of Breast Cancer
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Recep Basaran, Mehmet Tiryaki, Dilek Yavuzer, Mustafa Efendioglu, Ece Balkuv, and Aydin Sav
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Medicine - Abstract
Objective. Breast cancer accounts for approximately one-third of all cancers in females. Approximately 8.5 % of all central nervous system metastases are located in the spinal cord. These patients have rapidly progressing neurological deficits and require immediate examination. The aim of surgery is decompression of neural tissue and histological evaluation of the tumor. In this paper, we present a case of breast cancer metastasis in thoracic spinal intramedullary area which had been partially excised and then given adjuvant radiotherapy. Case. A 43-year-old female patient with breast cancer for 8 years was admitted to our hospital with complaints of weakness in both legs. Eight years ago, she received chemotherapy and radiotherapy. On her neurological examination, she had paraparesis (left lower extremity: 2/5, right lower extremity: 3/5) and urinary incontinence. Spinal MRI revealed a gadolinium enhancing intramedullary lesion. Pathologic examination of the lesion was consistent with breast carcinoma metastasis. The patient has been taken into radiotherapy. Conclusion. Spinal intramedullary metastasis of breast cancer is an extremely rare situation, but it has a high morbidity and mortality rate. Microsurgical resection is necessary for preservation or amelioration of neurological state and also for increased life expectancy and quality.
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- 2014
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22. DNA fragmentation simulation method (FSM) and fragment size matching improve aCGH performance of FFPE tissues.
- Author
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Justin M Craig, Natalie Vena, Shakti Ramkissoon, Ahmed Idbaih, Shaun D Fouse, Memet Ozek, Aydin Sav, D Ashley Hill, Linda R Margraf, Charles G Eberhart, Mark W Kieran, Andrew D Norden, Patrick Y Wen, Massimo Loda, Sandro Santagata, Keith L Ligon, and Azra H Ligon
- Subjects
Medicine ,Science - Abstract
Whole-genome copy number analysis platforms, such as array comparative genomic hybridization (aCGH) and single nucleotide polymorphism (SNP) arrays, are transformative research discovery tools. In cancer, the identification of genomic aberrations with these approaches has generated important diagnostic and prognostic markers, and critical therapeutic targets. While robust for basic research studies, reliable whole-genome copy number analysis has been unsuccessful in routine clinical practice due to a number of technical limitations. Most important, aCGH results have been suboptimal because of the poor integrity of DNA derived from formalin-fixed paraffin-embedded (FFPE) tissues. Using self-hybridizations of a single DNA sample we observed that aCGH performance is significantly improved by accurate DNA size determination and the matching of test and reference DNA samples so that both possess similar fragment sizes. Based on this observation, we developed a novel DNA fragmentation simulation method (FSM) that allows customized tailoring of the fragment sizes of test and reference samples, thereby lowering array failure rates. To validate our methods, we combined FSM with Universal Linkage System (ULS) labeling to study a cohort of 200 tumor samples using Agilent 1 M feature arrays. Results from FFPE samples were equivalent to results from fresh samples and those available through the glioblastoma Cancer Genome Atlas (TCGA). This study demonstrates that rigorous control of DNA fragment size improves aCGH performance. This methodological advance will permit the routine analysis of FFPE tumor samples for clinical trials and in daily clinical practice.
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- 2012
- Full Text
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23. Sıçanlarda alt ekstremite iskemi reperfüzyon hasarını takiben gelişen akciğer hasarının iloprost ile önlenmesi
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İSBİR, CEMİL SELİM, ARSAN, SİNAN, Atike KUNT TEKELİ, Selim İŞBİR, Ali CİVELEK, Serdar AKGÜN, H. Arzu ERGEN, Kurtkaya Özlem YAPICIER, Murat Aydın SAV, and Sinan ARSAN
- Abstract
Aim: The major part of tissue damage occurs upon reperfusion and is mediated by activated neutrophils that releaseoxygen free radicals. Following hind-limb ischemia/reperfusion, lung injury due to neutrophil infiltration and oxygenfree radicals has been demonstrated. Previous studies have shown that this injury can be prevented pharmacologically.Iloprost is a long acting stable analog of prostacyclin. The aim of this study is to test the effect of iloprost in prevention oflung injury due to lower limb ischemia/reperfusion.Material and Methods: Through a midline laparotomy infrarenal abdominal aorta was approached and cross-clampedin 20 male Spraque-Dawley rats for 2 hours. At the time of declamping Group I animals (n=8) received iloprost (0,1µg/kg/min) and Group II animals (n=8) received normal saline (0,1ml/kg/min) continously for 4 hours. Third group was the shamgroup (n=4). The lung tissue assays were performed for measurement of lipid peroxidation end product malondealdehydeand also total glutathione. Lung tissues were also examined histopathologically under light microscopy.Results: The malondealdehyde levels in the iloprost group were significantly lower than the control group (p0,05). Histopathologicalexamination revealed that the structure of the lung tissue was preserved in the iloprost group whereas lung tissue of thecontrol group had evidence of injury.Conclusion: Our results suggest that iloprost reduces the production of oxygen free radicals and prevents lung injury dueto lower limb ischemia reperfusion. Amaç: İskemi ve bunu takip eden reperfüzyon dönemi sonrasında ortaya çıkan doku hasarı büyük ölçüde reperfüzyon_x000D_ sırasında gerçekleşir. Aktive olmuş nötrofillerden salınan serbest oksijen radikalleri bu hasarda önemli rol oynarlar. Alt_x000D_ ekstremite iskemi-reperfüzyonu sonrasında görülen akciğer hasarında nötrofil infiltrasyonunun ve serbest oksijen_x000D_ radikallerinin önemi gösterilmiştir. Bu hasarı farmakolojik olarak önlemek için birçok çalışma yapılmıştır. İloprost, uzun_x000D_ etkili bir prostasiklin analoğudur. Çalışmanın amacı, alt ekstremite iskemi reperfüzyonu sonrası ortaya çıkan akciğer_x000D_ hasarını önlemedeki iloprostun etkisini araştırmaktır._x000D_ Gereç ve Yöntemler: Çalışmada 20 adet Spraque-Dawley cinsi erkek sıçan kullanıldı. Orta hattan yapılan laparotomi ile abdominal_x000D_ aortaya ulaşıldı. Grup I (n=8) ve Grup II (n=8) de bulunan deneklerin infrarenal aortalarına 2 saat boyunca kross klemp uygulandı._x000D_ Klemp kaldırıldığı sırada Grup I’de bulunan deneklere 0,1 g/kg/dk dozunda iloprost ve Grup II’de bulunan deneklere 0,1ml/kg/_x000D_ dk serum fizyolojik sürekli infüzyon şeklinde 4 saat boyunca verildi. Grup III(n=4) sham grubu olarak belirlendi. Denekler 4. saatin_x000D_ sonunda sakrifiye edilerek akciğer dokuları çıkarıldıve biyokimyasal ve histopatolojik inceleme yapıldı._x000D_ Bulgular: İloprost verilen grupta malondealdehyde seviyeleri kontrol grubuna göre istatistiksel olarak anlamlı derecede_x000D_ düşük bulundu (p0.05)._x000D_ Histopatolojik incelemede, iloprost verilen grupta akciğer dokusunun korunmuş olduğu gözlenirken kontrol grubunda_x000D_ akciğer doku harabiyeti tespit edilmiştir._x000D_ Sonuç: Sonuçlarımız alt ekstremite iskemi-reperfüzyonu sonrasında ortaya çıkan akciğer hasarının önlenmesinde_x000D_ iloprostun serbest oksijen radikal oluşumunu azaltarak etkili olduğunu göstermektedir.
- Published
- 2018
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