Basal Cell Adenoma of Parotid Gland: Case Report and Review of Literature

Abstract

Basal cell adenoma (BCA) of the salivary gland is a rare neoplasm consists of a monomorphic population of basaloid epithelial cells, and it accounts for approximately 1-2 % of all salivary gland tumors. Its most frequent location is the parotid gland. It usually appears as a firm and mobile slow-growing mass. Histologically, isomorphic cells in nests and interlaced trabecules with a prominent basal membrane are observed. In contrast to pleomorphic adenoma, it tends to be multiple and its recurrence rate after surgical excision is high. Due to prognostic implications, differential diagnosis with basal cell adenocarcinoma, adenoid cystic carcinoma and basaloid squamous cell carcinoma is mandatory. We report a case of BCA of the parotid gland. We also review the literature and discuss the diagnosis and management of this rare entity.

Keywords: Basal cell adenoma; Parotid gland; Salivary gland tumors.

Fig. 1

Histopathology under low power showing trabecular pattern in hematoxilin -eosin stain

Fig. 2

Histopathology under high power showing basaloid cells in hematoxilin -eosin stain

Fig. 3

CECT scan of face showing small soft tissue density space occupying mass lesion with popcorn peripheral calcifications left parotid gland

Fig. 4

Pre operative photograph showing swelling in left parotid region

Fig. 5

Post operative photograph after 2 weeks of surgery