title: Lichen planus showing columnar epidermal necrosis.
abstract: We describe a 9-year-old boy who presented with very itchy papules and plaques on both knees. Histologically, focal columnar epidermal necrosis was seen associated with features of classic lichen planus. A literature search using PubMed revealed that only two cases of transfusion-associated lichenoid graft-versus-host reaction showing columnar epidermal necrosis have been previously reported. Our case is the first of lichen planus showing columnar epidermal necrosis. In that lichenoid graft-versus-host reaction is a special form of lichen planus, it is possible to speculate that columnar epidermal necrosis may be a unique feature of lichen planus.
authors.affiliation: Department of Dermatology, College of Medicine and Medical Research Institute, Chungbuk National University, 62 Gaesin-dong, Heungdeok-gu, Cheongju, Chungbuk 361-711, Korea.
authors.forename: Tae Young
authors.initials: TY
authors.lastname: Yoon
authors.forename: Gu Chang
authors.initials: GC
authors.lastname: Lee
authors.forename: Young Gi
authors.initials: YG
authors.lastname: Kim
authors.forename: Mi Kyeong
authors.initials: MK
authors.lastname: Kim
authors.forename: Chi Yeon
authors.initials: CY
authors.lastname: Kim
mesh_terms: D002648:Child; D003937:Diagnosis, Differential; D004817:Epidermis / Q000473:pathology; D006086:Graft vs Host Disease / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D007717:Knee; D008010:Lichen Planus / Q000175:diagnosis* / Q000473:pathology; D008297:Male; D009336:Necrosis