Trichilemmal carcinoma

Elizabeth M. Billingsley, Hershey Medical Center
Thomas A. Davidowski, Hershey Medical Center
Mary E. Maloney, University of Massachusetts Medical School

At the time of publication, Mary E. Maloney was not yet affiliated with the University of Massachusetts Medical School.


Trichilemmal carcinoma is an uncommon cutaneous neoplasm that occurs in sun-exposed areas of older persons. It is thought to be related to the external root sheath of the hair follicle and to be the malignant counterpart of a trichilemmoma. We describe a case of trichilemmal carcinoma treated with Mohs micrographic surgery.