title: Sebaceous differentiation in adenoid cystic carcinoma of the parotid gland.
abstract: The first reported case of sebaceous differentiation  in adenoid cystic carcinoma is presented. The tumor arose in the superficial lobe of the left parotid gland of a 48-year-old white man, had a predominantly solid histologic pattern, and manifested focal sebaceous differentiation in each of three recurrences over a two-year period. Review of the medical literature suggests that sebaceous differentiation is a normal property of some salivary ducts and may be found in any type of salivary gland neoplasm which has a ductal component. The differential diagnosis of sebaceous and clear cell lesions of salivary glands is discussed.
mesh_terms: D000564:Ameloblastoma / Q000175:diagnosis; D002280:Basal Cell Carcinoma / Q000175:diagnosis / Q000473:pathology*; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008875:Middle Aged; D010307:Parotid Neoplasms / Q000175:diagnosis / Q000473:pathology*; D012468:Salivary Gland Neoplasms / Q000175:diagnosis; D012626:Sebaceous Gland Neoplasms / Q000175:diagnosis; D012627:Sebaceous Glands / Q000473:pathology*