BASAL CELL ADENOMA OF PAROTID GLAND: A RARE CASE REPORT AND REVIEW OF LITERATURE

Abstract

Salivary gland tumors are uncommon and constitute about 2.0 to 6.5 % of all head and neck tumors. Basal cell adenoma (BCA), which is classied in benign salivary gland tumors by WHO in 1991, is a rare neoplasm. Incidence rate of BCA is 1.0 %–3.7 % of all salivary gland tumors with most frequent location is the parotid gland(>80% cases of BCA) and other sites such as the upper lip, buccal mucosa, lower lip, palate and nasal septum rarely affected. It usually presents as a rm and mobile slow-growing mass. Histologically, it consists of a monomorphic population of basaloid epithelial cells that are arranged in the solid, trabecular, tubular and membranous patterns. It is important to differentiate BCA from benign tumor like pleomorphic adenoma showing absence of chondromyxoid stroma in former and malignant tumor like basal cell adenocarcinoma, adenoid cystic carcinoma and basaloid squamous cell carcinoma. We report a case of BCA of the parotid gland in 59 year male. We also review the literature and discuss the diagnosis and management of this rare entity.