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홍진경,박영민,조상현,조백기,박찬금 ( Jin Kyung Hong,Young Min Park,Sang Hyun Cho,Baik Kee Cho,Chan Kum Park ) 대한피부과학회 1997 대한피부과학회지 Vol.35 No.4
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. (Kor J Dermatol 1997;35(4): 798-801)