title: Proliferating trichilemmal cyst in an organoid nevus.
abstract: An unusual tumor mass of the scalp found in an elderly woman is presented. This lesion had many features simulating a verrucous squamous cell carcinoma of the scalp. Pathologic findings eventually revealed the tumor mass to be a proliferating trichilemmal cyst. Differentiation between a benign and malignant process in these lesions can sometimes be difficult. Clinical as well as histopathologic evaluation is necessary to make an accurate diagnosis.
authors.affiliation: Division of Hematology and Oncology, Wayne State University, Detroit, Michigan 48202.
authors.forename: C J
authors.initials: CJ
authors.lastname: Gordon
mesh_terms: D000368:Aged; D002291:Carcinoma, Papillary / Q000473:pathology; D003937:Diagnosis, Differential; D004814:Epidermal Cyst / Q000473:pathology*; D005260:Female; D006801:Humans; D009506:Nevus / Q000473:pathology*; D012535:Scalp / Q000473:pathology*; D012536:Scalp Dermatoses / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology*