Review ArticleEpithelioid Fibrous Histiocytoma: A Concise ReviewFelty, Cameron C. DO; Linos, Konstantinos MD Author Information Division of Laboratory Medicine, Department of Pathology, Dartmouth-Hitchcock Medical Center, Geisel School of Medicine at Dartmouth, Lebanon, NH. Correspondence: Konstantinos Linos, MD, Laboratory Medicine, Department of Pathology, Dartmouth-Hitchcock Medical Center, One Medical Center Drive, Lebanon, NH 03756 (e-mail: [email protected]). The authors declare no conflicts of interest. The American Journal of Dermatopathology: December 2019 - Volume 41 - Issue 12 - p 879-883 doi: 10.1097/DAD.0000000000001272 Buy Erratum Metrics Abstract Epithelioid fibrous histiocytoma (EFH) is a rare lesion believed to arise from dermal microvascular unit fibroblasts and dendritic histiocytes. EFH has long been considered a morphologic variant of benign fibrous histiocytoma (dermatofibroma), with prominent epithelioid cytomorphology that can mimic both vascular and melanocytic neoplasms. The molecular basis for the relationship between EFH and benign fibrous histiocytoma has remained largely unknown, with some authors suggesting that EFH represents an entity that is biologically distinct from benign fibrous histiocytoma. Recent molecular studies have identified the presence of recurrent anaplastic lymphoma kinase (ALK) gene rearrangements, a phenomenon that has not been described in benign fibrous histiocytoma. These new molecular findings highlight the uniqueness of this rare tumor and may prove useful as a diagnostic tool for differentiation from other histologic mimics. Erratum In the December 2019 American Journal of Dermatopathology article entitled, “Epithelioid Fibrous Histiocytoma: A Concise Review,” an error was made. The first line of the article reads “In 1988, Jones et al….” The author's actual last name is Wilson Jones, and this author's name is cited incorrectly in the literature. Additionally, the paper cited was published in 1989, not 1988. The correct first line should read “In 1989, Wilson Jones et al1 described….” The American Journal of Dermatopathology. 42(8):628, August 2020. Copyright © 2018 Wolters Kluwer Health, Inc. All rights reserved.