Induction of Desmoplastic Trichoepithelioma in a DermatofibromaGeorgescu, Mihaela, MD*; Blödorn-Schlicht, Norbert, MD†; Böer-Auer, Almut, MD†The American Journal of Dermatopathology: December 2018 - Volume 40 - Issue 12 - p 924–926 doi: 10.1097/DAD.0000000000000982 Extraordinary Case Report Buy SDC Abstract Author InformationAuthors Article MetricsMetrics Abstract: Induction of follicular germinative structures above a dermatofibroma (DF) is a common finding. Rarely, induction of a trichoblastoma in a DF has been observed. Here, we report the case of a desmoplastic trichoepithelioma induced by a DF. The lesion with clinical and histological appearance of a DF situated on the left dorsal foot showed an associated adnexal proliferation that fulfilled histopathological criteria of desmoplastic trichoepithelioma. Immunohistochemistry (Ber-EP4, Bcl-2, CK17, CK20, CK7, EMA, and Ki67) helped to confirm the diagnosis and to exclude possible differential diagnoses. *Dermatology Department, “Dr. Carol Davila” Central Military Emergency University Hospital, Bucharest, Romania; and †Dermatopathology Laboratory, Dermatologikum, Hamburg, Germany. Correspondence: Almut Böer-Auer, MD, Dermatopathology Laboratory, Dermatologikum, 20354 Hamburg, Germany (e-mail: firstname.lastname@example.org). The authors declare no conflicts of interest. Copyright © 2018 Wolters Kluwer Health, Inc. All rights reserved.