Non-epidermoid Epithelial Neoplasms
Most cases of carcinoma of the nasal cavity and paranasal sinuses — a rare entity — are of epidermoid type so that the numbers of non-epidermoid carcinomas are very small indeed. Sinonasal adenocarcinomas are primarily of two types, one originating from the surface epithelium and the other from mucosal seromucinous glands (most of the latter being salivary gland adenocarcinomas of different types). The exact incidence of each of these types of sinonasal adenocarcinomas is extremely difficult to access as almost every report on the subject has made no distinction between adenocarcinoma from surface epithelium and seromucinous gland adenocarcinomas (apart from adenoid cystic carcinoma). However, one can estimate sinonasal adenocarcinomas to represent from 6% to 13% of sinonasal malignancies.1, 2
KeywordsSalivary Gland Nasal Cavity Paranasal Sinus Adenoid Cystic Carcinoma Pleomorphic Adenoma
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