title: Retroauricular Pleomorphic Adenoma Arising from Heterotopic Salivary Gland Tissue.
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.
authors.affiliation: West Virginia University School of Medicine, West Virginia University, Morgantown, W.Va.; Department of Pathology, West Virginia University School of Medicine, Morgantown, W.Va.; and Division of Plastic, Reconstructive and Hand Surgery, West Virginia University School of Medicine, Morgantown, W.Va.
authors.forename: Luke
authors.initials: L
authors.lastname: Grome
authors.affiliation: West Virginia University School of Medicine, West Virginia University, Morgantown, W.Va.; Department of Pathology, West Virginia University School of Medicine, Morgantown, W.Va.; and Division of Plastic, Reconstructive and Hand Surgery, West Virginia University School of Medicine, Morgantown, W.Va.
authors.forename: Patrick
authors.initials: P
authors.lastname: Bacaj
authors.affiliation: West Virginia University School of Medicine, West Virginia University, Morgantown, W.Va.; Department of Pathology, West Virginia University School of Medicine, Morgantown, W.Va.; and Division of Plastic, Reconstructive and Hand Surgery, West Virginia University School of Medicine, Morgantown, W.Va.
authors.forename: Gregory
authors.initials: G
authors.lastname: Borah