Parotid Heterotopia With Pleomorphic Adenoma: Report of an Unusual Neck Mass

Abstract

\s=b\We observed an unusual and clinical-

Pleomorphic adenoma arising from ectopic salivary glands in the submandibular region: a case report

“… [7] and Cotelingam et al . [ 8 ] reported that some para-parotid and cervical lymph nodes contain salivary glands. The tissue of origin was thought to be an ectopic salivary gland that had invaded the submandibular lymph nodes.…”

Heterotopic pleomorphic adenoma in the postauricular area

“…Heterotopic salivary tumors are predominantly found in the anterior triangle of the upper neck 6 . A review of the literature revealed a small number of heterotopic pleomorphic adenomas noted in the neck 4, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20. Tumor locations of the presented cases were mainly in the upper neck and anterior to the sternomastoid muscle (Table 1).…”

Pleomorphic Adenoma of Ectopic Salivary Gland Tissue in the Upper Neck

“…Many theories have been put forward to explain the occurrence of this condition: abnormal persistence and development of vestigial structures, dislocation of a portion of definitive organ rudiment mass, and further development along with abnormal differentiation of local tissues. Now days, the best accepted theory is that the presence of heterotopic salivary tissues in the neck arises from epithelial remnants in the branchial apparatus [7,[11][12][13][14][15].…”

“…Mixed salivary tumors are the most frequent occurrences among ectopic neoplasm; they have the same percentage of recurrence but a higher percentage of cancerization than those occurring in major salivary glands [5,9,11]. Other tumors arising within ectopic salivary glands, within and beyond the confines of the neck, include adenolymphoma, adenoid cystic carcinoma, mucoepidermoid carcinoma, and anaplastic carcinoma [10,13].…”