title: Multiple trichodiscomas: histogenetical observations.
abstract: A 23-year-old man with multiple trichodiscomas on his face is described. Four papules were histologically examinated, and all of them showed similar findings, a dermal fibrovascular proliferation with abundant ground substance between collagen bundles and an absence of elastic fibers. We found no evidence to establish a relationship between trichodiscomas and hair disk, and, in our opinion, these lesions should be included into the spectrum of hyperplasia of the adventicial dermis.
authors.affiliation: Departamento de Dermatología, Hospital Universitario San Carlos, Facultad de Medicina, Universidad Complutense, Madrid, Spain.
authors.forename: L
authors.initials: L
authors.lastname: Requena
authors.forename: C
authors.initials: C
authors.lastname: Schöendorff
authors.forename: M J
authors.initials: MJ
authors.lastname: López
authors.forename: E S
authors.initials: ES
authors.lastname: Yus
mesh_terms: D000328:Adult; D003094:Collagen / Q000648:ultrastructure; D004547:Elastic Tissue / Q000473:pathology; D005148:Facial Dermatoses / Q000473:pathology*; D006201:Hair Diseases / Q000473:pathology*; D006222:Hamartoma / Q000648:ultrastructure*; D006801:Humans; D006965:Hyperplasia; D008297:Male; D008854:Microscopy, Electron
chemical_list: D003094:Collagen