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Case Reports
. 2016 Sep 23;4(9):e1028.
doi: 10.1097/GOX.0000000000001028. eCollection 2016 Sep.

Retroauricular Pleomorphic Adenoma Arising from Heterotopic Salivary Gland Tissue

Luke Grome  1 , Patrick Bacaj  1 , Gregory Borah  1
Affiliations
Case Reports

Retroauricular Pleomorphic Adenoma Arising from Heterotopic Salivary Gland Tissue

Luke Grome et al. Plast Reconstr Surg Glob Open. .

Abstract

A 38-year-old woman is described who presented with a slowly growing mass on the posterior aspect of the left ear. Excision and histopathologic evaluation revealed a pleomorphic adenoma (PA) originating from heterotopic salivary gland tissue. Many authors have presented cases of PAs originating from ceruminous glands in the external auditory canal or of so-called chondroid syringoma originating from apocrine and eccrine sweat glands. This is the only case in the recent literature of a PA originating from a heterotopic rest of salivary gland tissue in the retroauricular region. The 3 main sources of PAs, their embryologic derivation, and treatment are described.

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Conflict of interest statement

The authors have no financial interest to declare in relation to the content of this article. The Article Processing Charge was paid for by the authors.

Figures

Fig. 1.
Fig. 1.
Biphasic tumor with stromal and epithelial components consistent with PA. Tumor arises from normal parotid gland tissue (upper right); H&E, 100×.
Fig. 2.
Fig. 2.
Spindled to ovoid myoepithelial cells in a chondromyxoid and collagenous stroma; H&E, 200×.
Fig. 3.
Fig. 3.
Cuboidal epithelial cells forming duct-like structures in a background of spindled myoepithelial cells. The dual cell population is characteristic of PA; H&E, 400×.
See this image and copyright information in PMC

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