Extraordinary Case ReportCuticular Poroma: A Poroma Mostly Composed of Cuticular Cells (Cuticuloma)Alegría-Landa, Victoria MD*; Kutzner, Heinz MD†; Requena, Luis MD*Author Information *Department of Dermatology, Fundación Jiménez Díaz, Universidad Autónoma, Madrid, Spain; and †Dermatopathologie Laboratory, Friedrichshafen, Germany. Correspondence: Luis Requena, MD, Department of Dermatology, Fundación Jiménez Díaz, Avda. Reyes Católicos 2, 28040 Madrid, Spain (e-mail: [email protected]). The authors declare no conflicts of interest. The American Journal of Dermatopathology: July 2018 - Volume 40 - Issue 7 - p e104-e106 doi: 10.1097/DAD.0000000000001086 Buy Metrics Abstract Poromas are benign cutaneous adnexal neoplasms with differentiation toward excretory ducts of eccrine and apocrine glands. They are mainly composed of solid aggregates of small, monomorphous, round, and basophilic poroid cells, with a lower proportion of larger, squamous, eosinophilic cuticular cells, which are lining ductal structures with an eosinophilic luminal cuticle. In most cases of poromas, cuticular cells represent a small proportion of the neoplastic aggregates. We report 2 poromas mostly composed of cuticular cells, and on the basis of these findings, we have named cuticuloma to this histopathologic variant of poroma. Copyright © 2017 Wolters Kluwer Health, Inc. All rights reserved.