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Case Reports in Oncological Medicine
Volume 2016 (2016), Article ID 7481569, 4 pages
http://dx.doi.org/10.1155/2016/7481569
Case Report

Atypical Proliferating Trichilemmal Cyst with Malignant Breast Skin Transformation: A Case Report and Review of the Literature

1Departamento de Oncología Mamaria Quirúrgica, Instituto de Enfermedades de la Mama (IEM), La Fundación del Cáncer de Mama (FUCAM), 40980 Mexico City, Mexico
2Facultad de Ciencias de la Salud, Universidad Anáhuac México Norte, 52786 Huixquilucan, MEX, Mexico
3Departamento de Patología, Instituto de Enfermedades de la Mama (IEM), La Fundación del Cáncer de Mama (FUCAM), 40980 Mexico City, Mexico

Received 30 November 2015; Accepted 18 January 2016

Academic Editor: Jose I. Mayordomo

Copyright © 2016 Marino Antonio Capurso-García et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Proliferating trichilemmal tumors (PTTs) are benign adnexal skin neoplasms that arise from the outer root sheath of the hair follicle. These tumors are most commonly observed on the scalp and occur, most of the time, in elderly women. Malignant transformation of these neoplasms is a rare event; less than 50 cases have been reported in the English medical literature. We present the case of a 39-year-old Hispanic woman with a tumor located on the skin of one of her breasts that in her third surgical procedure the histologic examination revealed the presence of a malignant proliferating trichilemmal tumor (MPTT). Furthermore, a review of the medical literature and a discussion of the clinical and pathologic features of this rare entity are provided.