Korean J Dermatol.
1999 Nov;37(11):1673-1675.
A Case of Trichilemmal Carcinoma on the Lower Lip
- Affiliations
-
- 1Department of Dermatology, College of Medicine, The Catholic University of Korea, Seoul, Korea.
- 2Department of Anatomical Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea.
Abstract
- We report a case of Trichilemmal carcinoma in a 75-year-old man who was presented with an exophytic nodule on the lower lip. The tumor was composed of glycogen-rich cytoplasmic cells with PAS-positive, diastase-labile and had a characteristic trichilemmal keratinization. The trichilemmal carcinoma is well known to have originated from the outer root sheath of the hair follicle in the hair bearing area. It is interesting that our case had developed on the lip, an exceptional site for a follicular tumor : the hair follicle could not be seen. It might have been developed from an ectopic follicle or at the follicle of vermillion border and grew up into the lip.
