A vertical conduit in the basisphenoid extending from the floor of the sella to the undersurface of this bone was observed in two children. There was no associated nasopharyngeal mass. A review of the literature on this defect and related subjects suggests a close relation between this lesion and transsphenoidal meningoencephalocele.

The incidence of nasopharyngeal carcinoma (NPC) varies widely according to age at diagnosis, geographic location, and ethnic background. On a global scale, NPC incidence is common among specific populations primarily living in southern and eastern Asia and northern Africa, but in most areas, including almost all western countries, it remains a relatively uncommon malignancy. Specific to these l...

An unusual case of entirely infrasellar craniopharyngioma mimicking a clival chordoma is described. Only 22 cases of craniopharyngioma with nasopharyngeal extension have been reported in the literature. Of the reported cases, most were primarily intracranial with secondary downward extension; only two were thought to originate from an infrasellar location. The present case is another example of...

OBJECTIVES To compare the incidence rates of nasopharyngeal carcinoma (NPC) among US black, white, and Asian/Pacific Islander (Asian) populations, with a focus on those diagnosed before age 20 years and between ages 20 and 29 years. Our secondary objective was to determine differences in survival rates between US blacks, whites, and Asians with NPC who were younger than 30 years. DESIGN Data ...

statement of problem: nasopharyngeal obstruction by adenoid enlargement is one of the main causes of mouth breathing. diagnostic indices of nasopharyngeal obstruction by lateral cephalometric radiography are controversial. purpose: the purpose of this study was to diagnose the nasopharyngeal obstruction by means of lateral cephalometric radiography. materials and methods: in this research two g...

primary nasopharyngeal tuberculosis (tb) without pulmonary involvement is rare, even in endemic areas. herein, we present a rare complication of primary nasopharyngeal tb accompanied with tuberculous otomastoiditis (tom) and ipsilateral facial nerve palsy, in a 24-year-old female patient, with computed tomography and magnetic resonance imagery findings.

juvenile nasopharyngeal angiofibroma (jna) is a rare, benign and locally invasive tumor. massive bleeding because of vascularity of tumor and postoperative recurrence are potential problems of management. endonasal approach reduces the rate of postoperative recurrence, intraoperative bleeding, and complications of surgery, time of operation and duration of hospitalization. in this article, we r...

background: overexpression of rad51 protein in many tumor cells has been proven to increase radioresistance and can be related to the resistance of chemosensitivity of tumor cells. this preliminary study was conducted to determine the relationship between the rad51 expression level in nasopharyngeal carcinoma and the response of the treatment based on the measurement of the tumor reduction. met...