title: Stimulation of folliculo-sebaceous proliferations by neurofibromas: a report of two cases.
abstract: Two unrelated patients, a woman aged 44 and a man aged 56, with a type I neurofibromatosis, showed comedo-like formations at the top of some neurofibromas. One of them was excised in each case and they were studied histopathologically. The comedo-like formation of the first case mimicked the epithelial component of a fibrofolliculoma, and that of the second case had the structure of a primary late microcomedo and showed also anagen hair differentiation in the form of a follicular bulb and papilla. Both events are considered to be the result of a stimulation phenomenon and to reflect the essential role of the stroma in many cutaneous epithelial hyperplasias, hamartomas and possibly in some neoplasms.
authors.affiliation: Division of Dermatology, Hospital de Conxo, Complexo Hospitalario Universitario de Santiago, Santiago de Compostela, Spain. edelriod@meditex.es
authors.forename: E
authors.initials: E
authors.lastname: del Río
authors.forename: E
authors.initials: E
authors.lastname: Sánchez Yus
authors.forename: P
authors.initials: P
authors.lastname: Simón
authors.forename: H A
authors.initials: HA
authors.lastname: Vázquez Veiga
mesh_terms: D000328:Adult; D002455:Cell Division; D003937:Diagnosis, Differential; D005260:Female; D005350:Fibroma / Q000175:diagnosis; D018859:Hair Follicle / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009456:Neurofibromatosis 1 / Q000378:metabolism / Q000473:pathology*; D009418:S100 Proteins / Q000378:metabolism; D012627:Sebaceous Glands / Q000473:pathology*; D012867:Skin / Q000473:pathology; D012878:Skin Neoplasms / Q000378:metabolism / Q000473:pathology*
chemical_list: D009418:S100 Proteins