The skin of the head and neck is the cutaneous region of the body with the greatest density of sebaceous glands. The head and neck (oral mucous membranes and parotid glands) is also the anatomical area bearing the greatest number of sebaceous gland ectopias. Despite this relatively heavy concentration, true neoplasms, ie, sebaceous cell adenomas and carcinomas are infrequent. Intraoral neoplasms may be considered as oddities and, including one of the cases presented in this report, there have been only two examples of primary sebaceous cell carcinomas of the parotid gland in the literature. Paraparotid sebaceous cell carcinomas, other cutaneous sebaceous cell carcinomas, and sebaceous cell components of other salivary gland lesions are relatively more frequent, albeit of a low frequency.
Batsakis JG, Littler ER, Leahy MS. Sebaceous Cell Lesions of the Head and Neck. Arch Otolaryngol. 1972;95(2):151–157. doi:10.1001/archotol.1972.00770080239012
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