Korean J Dermatol.
1997 Aug;35(4):798-801.
A Case of Inverted Follicular Keratosis Arising from Nevus Sebaceus
- Affiliations
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- 1Department of Dermatology, School of Medicine, The Catholic University of Korea, Korea.
- 2Department of Pathology, Hanyang University College of Medicine, Seoul, Korea.
Abstract
- Inverted follicular keratosis is a benign epithelial tumor occurring most frequently on the face or scalp of older persons as a firm, skin-colored papule. It may rarely occur from a pre-existing nevus sebaceus as a secondary tumor. Herein we report a case of inverted follicular keratosis arising from a pre-existing nevus sebaceus in a 47-year-old male. He presented with a keratotic erythematous dome-shaped tumor which suddenly developed from a pre-existing yellowish papillomatous plaque on his scalp. Histopathological findings of the secondary lesion revealed a proliferating epithelial tumor with numous squamous eddies in the center, consistent with inverted follicular keratosis.
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