نتایج جستجو برای: sinonasal tract
تعداد نتایج: 136660 فیلتر نتایج به سال:
BACKGROUND. Ameloblastomas are locally aggressive jaw tumors with a high proDuane R. Schafer, D.D.S., CDR, DC, USN pensity for recurrence and are believed to arise from the remnants of odontogenic Lester D. R. Thompson, M.D., LCDR, MC, epithelium. Extragnathic ameloblastomas are unusual and primary sinonasal tract USNR origin is extraordinarily uncommon. Brion C. Smith, D.D.S., LTC, DC, USA MET...
The sinonasal tract, lined by ciliated respiratory mucosa (Schneiderian epithelium), gives rise to three distinct papilloma morphologies. Collectively, these lesions are referred to as Schneiderian papillomas and include inverted (∼50%), exophytic (∼47%), and oncocytic (∼3%) types. The tumors are uncommon, with an incidence of about 2.3 cases per 100,000 population. The lesions develop over a b...
Intraosseous lipomas are very rare slow-growing benign tumors that may appear as congenital lesions or may be acquired (metaplasia from a pre-existing lipoma). Only a handful of head and neck cases have been reported in the literature. We present the first reported case of a solitary osteolipoma involving the sinonasal tract in a 66-year-old man with sinonasal symptoms. CT showed a lesion invol...
Leiomyomas are benign smooth-muscle tumors that are common in the alimentary tract, uterus, skin, and subcutaneous tissue. They are very uncommon in the upper respiratory tract and rare in the nasal cavity and paranasal sinuses. To the best of our knowledge, only 23 such cases have heretofore been published in the literature. We report 2 new cases of sinonasal leiomyoma that originated at diffe...
OBJECTIVES Sinonasal mucosal melanoma is a rare and aggressive disease. The aim of this study was to analyze the clinical features of patients with sinonasal mucosal melanoma and to determine the role of Ki67 antigen as a predictor of prognosis in sinonasal mucosal melanoma. METHODS This was a retrospective case-series study at a single institution, an academic tertiary referral center. From ...
Human Papilloma Virus (HPV) can play a causative role in the development of sinonasal tract malignancies. In fact, HPV may be the most significant causative agent implicated in sinonasal tumorigenesis and is implicated in as many as 21% of sinonasal carcinomas. To date, there are no definitive, reliable and cost-effective, diagnostic tests approved by the FDA for the unequivocal determination o...
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