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Background When advanced, oral squamous cell carcinoma (OSCC) may involve adjacent non-epithelial structures, and the prognosis is worse for bone invasion. Human relaxin-2 is a peptide hormone that has recently been associated with cancer. It can induce human osteoclast differentiation and activation, suggesting a role in tumor-driven osteolysis. This study was a preliminary assessment of the prognostic role of relaxin-2 in surgical specimens of OSCC tissue and adjacent but uninvolved mandibular/maxillary bone. Methods Relaxin-2 immunohistochemical expression and reaction intensity were assessed in tumor and uninvolved adjacent mandibular/maxillary bone specimens from 23 operated OSCC patients. Results All OSCC specimens were positive for relaxin-2. The intensity of its reaction in OSCC correlated significantly with the pattern of the tumor's invasion front (p = 0.02), being higher with the infiltrative pattern. Mean relaxin-2 immunohistochemical expression was higher in patients whose OSCC recurred after treatment than those experiencing no recurrence (81.3% ± 22.6% vs. 59.5% ± 29.7%, respectively). A significant direct association emerged between relaxin-2 expression in OSCC specimens and recurrence rate (p = 0.049). Conclusions Relaxin-2 expression in OSCC should be further investigated as a potentially useful marker for identifying patients at higher risk of recurrence, who might benefit from closer follow-up and more aggressive adjuvant therapy. In other oncological settings, increasing evidence of relaxin being produced by cancer cells is prompting efforts to synthesize human relaxin-2 analogs capable of acting as antagonists and limiting tumor growth.

Background Adenosquamous carcinoma (ASC) of the head and neck is a rare malignancy characterized by loco-regional and distant aggressiveness. At histology, ASC reveals two distinct, juxtaposed components, squamous cell carcinoma (SCC), and true adenocarcinoma. Methods The immunohistochemical expression of AE3, CK19 and CAM5.2, and HPV infection was tested in a case of laryngeal ASC. Results The patient had no regional lymph node metastases, but developed a recurrence in neck soft tissues shortly after primary radical surgery. The laryngeal surgical specimen had the typical morphological features of ASC. The tumor's squamous and glandular components were both strongly and diffusely immunoreactive for AE3 and CK19, whereas CAM5.2 selectively stained only the gland-like part. We found no high- or low-risk HPV DNA (28 genotypes) in the specimens. The patient underwent salvage extended radical neck dissection and received postoperative radio-chemotherapy. At 4-month follow-up control, neck recurrence was found. Palliative chemotherapy was instituted. Conclusions An accurate histological and immunohistochemical diagnosis is mandatory to differentiate ASC from conventional SCC. Radical surgical excision is recommended for laryngeal ASC. Adjuvant postoperative therapy is administered in most cases, but there are no widely accepted indications for these treatments.

Objective:To discover the anatomist who first identified the upper oesophageal sphincter.Method:The authors searched dozens of antique anatomy textbooks kept in the old section of the ‘Vincenzo Pinali’ Medical Library of Padua University, looking for descriptions of the upper oesophageal sphincter.Results:The oesophageal sphincter was drawn correctly only in 1601, by Julius Casserius, in the book De vocis auditusque organis historia anatomica… (which translates as ‘An Anatomical History on the Organs of Voice and Hearing …’), and was properly described by Antonio Maria Valsalva in 1704 in the book De aure humana tractatus… (‘Treatise on the Human Ear …’).Conclusion:Anatomists Casserius and Valsalva can be considered the discoverers of the ‘oesophageal sphincter’.

Objectives: To assess the effectiveness of mandibular advancement devices (MADs) for the treatment of obstructive sleep apnea syndrome (OSAS) over a long-term follow-up in patients non-compliant with continuous positive airway pressure (CPAP) and to identify potential predictive factors of response to MADs. Methods: Fifteen OSAS patients were enrolled. Apnea-hypopnea index (AHI) and daytime sleepiness were assessed at baseline and at the end of follow-up. Potential baseline predictors of treatment effectiveness were assessed. Results: AHI and Epworth Sleepiness Scale (ESS) scores improved significantly with MADs. Sixty per cent of patients were ‘responders’, of whom 33% were ‘full responders’. Sixty-seven per cent of patients showed total compliance. No correlations between the potential predictors and the response to MAD therapy were found. Discussion: Effectiveness of MAD therapy was shown over a long-term follow-up in OSAS patients with low compliance to CPAP. Efforts to identify predictive success factors fell short.

Aims: The present study was designed to test the hypothesis that dental occlusion may have a role in mediating the effects of bruxism in temporomandibular disorders (TMD) patients. It aimed to answer the clinical research question: in a population of TMD patients with clinically diagnosed clenching-type bruxism, are the different TMD diagnoses associated with different occlusal features? Materials and methods: A total of 294 TMD patients (73% females, mean age 38.369.2 years) who were positive for a clinical diagnosis of clenching-type bruxism underwent an assessment in accordance with the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) axis I, as well as a recording of nine occlusal features. Statistical analyses were performed to test the null hypotheses that: (1) no differences existed between the patients with or without the various occlusal features as for the prevalence of the various single and combined RDC/TMD group diagnoses (single variable analysis), and (2) having any specific occlusal feature makes no difference in distinguishing within the RDC/TMD diagnoses (multiple variable analysis). Results: The distribution of the different combination of RDC/TMD axis I diagnoses was significantly different in patients with laterotrusive interferences with respect to those without such interferences (chisquare515.209; P50.033) as well as in patients with a slide from retruded contact position (RCP) to maximum intercuspation (MI) .2 mm with respect to those without such slide (chi-square54.029; P50.012) and in those with or without molar class asymmetry (chi-square517.438; P50.015). Multinomial regression analysis showed that the model including the various occlusal features account for 20.4% of the variance for RDC/TMD diagnoses (Nagelkerke R 2 50.204) and allowed the rejection of the null hypothesis that having such specific occlusal features makes no difference in distinguishing within the RDC/TMD diagnoses. Conclusions: Within the limitations of this study, it can be suggested that in a population of patients with TMD and clinically-diagnosed clenching-type bruxism, the patterns of TMD diagnoses may be influenced, at least in part, by the presence of some features of dental occlusion, namely, slide RCP-MI, laterotrusive interferences, and molar asymmetry.

Objectives Before the widespread use of antibiotics, most deep neck infections (DNIs) stemmed from complicated pharyngeal infections. Nowadays, they seem to be due mainly to dental infections. In 2010, our group reported that DNIs originated from a major salivary gland in 14% of cases. The main endpoint of the present investigation was to review our experience of the diagnosis and treatment of DNIs of salivary gland origin. We also compared the characteristics of DNIs originating from salivary glands with those originating elsewhere. Methods Between 2000 and 2011, 44 patients were treated for DNIs of salivary origin at our institution. These patients were compared with 191 cases of DNI diagnosed as having other sites of origin. Results/conclusions In the present series, DNIs originating from a major salivary gland accounted for 19% of all cases of DNI of known origin. Patients with DNI of salivary gland origin were more likely to be elderly than those whose DNI originated from elsewhere (p = 0.000). Our multivariate statistical model showed that comorbidities (p = 0.051, statistical trend) and the need for surgical treatment (p = 0.028) independently predicted long-term hospitalization for DNIs originating from a major salivary gland.

Objectives/Hypothesis Obstructive sleep apnea syndrome (OSAS) is a chronic condition, characterized by recurrent episodes of upper airway collapse during sleep, which affects up to 5% of adults in the Western population. The muscle tone of the human body ordinarily relaxes during sleep, thus causing airway obstruction and leading to sleep apnea. We report a case of a 68-years old male in which dystonic closure of the larynx during sleep caused OSAS. The sleep endoscopy was crucial in establishing the diagnosis of laryngeal dystonia. A botulinum toxin injection in the vocal cord improved the OSAS. These findings define a novel sleep-related breathing disorder.

The cochlear implant (bionic ear) is a device that bypasses a nonfunctional inner ear and stimulates the hearing nerves with patterns of electrical currents so that speech and sounds can be perceived by profoundly deaf people. The function of cochlear implant is today well known but, its early development through the history of electrical stimulation of the ear is uncertain. The Count Alessandro Volta is generally qualified as the first to stimulate the ear with the electricity. His results were read on June 26, 1800, before the Royal Society meeting in London. Investigating exhaustively the available literature of the eighteenth century, we found an electrical stimulation of the ear carried out, half century before Volta, in 1748 by Giuseppe Veratti a Bolognese physicist.

Objectives Nasal irrigations are mentioned among the adjunctive measures for treating several sinonasal conditions. Hyperchromatic supranuclear stria (HSS) in the ciliated cells (CCs) has recently been suggested as a potential cytological marker of the anatomofunctional integrity of nasal mucosa. The aim of this study was to compare the effects of nasal irrigations with sulfurous, salty, bromic, iodic (SSBI) thermal water or isotonic sodium chloride solution (ISCS) in patients with nonallergic chronic rhinosinusitis, considering the endoscopic, functional, microbiological, and cytological evidence (including the ratio of HSS-positive CCs to total CCs [the HSS+ rate]). Methods In a prospective, randomized, double-blind setting, 80 patients were recruited for nasal irrigations with SSBI water or ISCS for 1 month. Results An endoscopically assessed significant clinical improvement was seen after both SSBI thermal water and ISCS irrigations. Before treatment, Staphylococcus aureus was isolated in 5 patients in the SSBI thermal water group and 4 in the ISCS group. After the nasal irrigations, there was no sign of the bacteria in either group. Only the SSBI water irrigations significantly reduced total nasal resistance, as determined by rhinomanometry. Mild nasal irritation (6 cases) and episodes of extremely limited epistaxis (5 cases) were only reported after SSBI thermal water irrigations. Neither type of nasal irrigation significantly increased the mean HSS+ rate at cytological control after 1 month. Conclusions Both types of nasal irrigation improved the endoscopic and microbiological features of patients with nonallergic chronic rhinosinusitis, whereas only SSBI irrigations significantly reduced total nasal resistance. Further investigations are needed based on longer treatments and follow-up periods to establish whether the HSS+ rate is useful for monitoring clinical improvements in chronic rhinosinusitis treated with nasal irrigations.

It is known that 15-20% of oropharyngeal carcinomas develop distant metastases that involve most commonly lung, liver and bone. Clival metastasis from oropharyngeal squamous cell carcinoma has not been previously reported in the English literature. We describe the rare occurrence of clival metastasis from tonsillar carcinoma presenting with abducent paralysis and discuss diagnostic and therapeutic rational approaches. Despite neoadjuvant chemotherapy (cisplatinum/etoposide/epirubicin followed by taxotere), extended left tonsillectomy and ipsilateral radical neck dissection and external radiotherapy (60 Gy) for tonsillar carcinoma, the patient developed clival metastasis and died of disease. The overall prognosis of patients with clival metastases is extremely poor, with an overall median survival of about 2.5 years. Cranial nerve palsy occurrence is associated with a poorer prognosis with an average survival of only 5 months.

Laryngeal carcinoma is the 11th commonest form of cancer in men world-wide, with 121,000 new cases in 1985. More than 95% of all laryngeal malignancies are squamous cell carcinomas. Treatment indications in cancer of the larynx are often controversial, since there are few comparative studies of different available therapeutic approaches. Surgery and radiotherapy are both widely used, and the choice between these two procedures is the most common therapeutic decision which has to be taken. Laryngeal function preservation has gained more and more weight in the last decades and chemotherapy is also a significant component of several curative approaches. In the last decades, several organ-preserving surgical techniques have become available and consequently total laryngectomy results less applied. Regardless of the treatment modality, Tis, T1, T2 laryngeal carcinomas have an 80-90% probability of cure, whereas for more advanced tumours this is approximately 60%. The most effective approach to laryngeal cancer remains prevention and early diagnosis when this cancer is curable with function preserving treatments.