title: Reactive perforating collagenosis. Report of 3 cases.
abstract: 3 cases of reactive perforating collagenosis in siblings are reported which were characterized clinically by typical umbilicated papules at sites exposed to traumatism. The histopathological feature is characterized by a cup-shaped depression of the epidermis together with extrusion of collagen fibers at its base.
mesh_terms: D000328:Adult; D002648:Child; D003095:Collagen Diseases / Q000209:etiology / Q000235:genetics* / Q000473:pathology; D005260:Female; D005542:Forearm; D006229:Hand Dermatoses / Q000209:etiology / Q000235:genetics* / Q000473:pathology; D006801:Humans; D008297:Male; D013848:Thigh; D014947:Wounds and Injuries / Q000150:complications