TLDR A man had a black pore on his cheek, which was removed and found to be a hair follicle tumor.
A 65-year-old man presented with a 3- to 4-mm pore on his cheek, which had been present for 6 years and frequently extruded a black substance. The lesion was diagnosed as a trichofolliculoma, an adnexal tumor of hair follicle origin. Histological examination revealed a dilated, keratin-filled invagination lined by keratinizing squamous epithelium, with numerous projections showing follicular differentiation. The patient's request for excision of the lesion was fulfilled.
81 citations
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August 1979 in “Archives of Dermatology” Trichofolliculomas can sometimes be more aggressive than thought.
2 citations
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June 1989 in “Archives of Dermatology” A black pore on a man's cheek was a hair follicle tumor and was removed.
June 2021 in “Scholars journal of applied medical sciences” Trichofolliculoma, a rare benign hair follicle tumor, can potentially recur.
June 2023 in “Dermatopathology” A woman had a unique skin growth with hair follicle, oil glands, fat cells, spindle cells, and nerve fibers.
53 citations
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January 2013 in “Journal of toxicologic pathology” The project created a standardized system for classifying skin lesions in lab rats and mice.
July 2025 in “Clinical Dermatology Review” A rare family case of multiple benign hair follicle tumors was identified, highlighting the need to distinguish them from similar conditions.
