title: Pilomatricoma associated with several hair follicles.
abstract: We report two cases of pilomatricoma in which the neoplasm was connected with several hair follicles. A 17-year-old boy developed an erythematous nodule, 1 cm in diameter, in the right temporal region, histologically showing basophilic cells connected with at least two hair follicles. In the other case, a 20-year-old man had a centrally ulcerated tumor, 2 cm in diameter, in the left lower back. Basophilic cells proliferated in connection with at least six hair follicle-like structures, accompanied by the development of shadow cells underneath. The histopathologic findings in these two cases suggest the existence of a subset of pilomatricomas that involve several pre-existing hair follicles.
authors.affiliation: Department of Dermatology, Kumamoto University School of Medicine, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Noguchi
authors.forename: K
authors.initials: K
authors.lastname: Kayashima
authors.forename: T
authors.initials: T
authors.lastname: Ono
mesh_terms: D000293:Adolescent; D000328:Adult; D006201:Hair Diseases / Q000473:pathology*; D018859:Hair Follicle / Q000473:pathology*; D006801:Humans; D008297:Male; D018296:Pilomatrixoma / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology*