title: Unilateral lichen planus pigmentosus mimicking acral lentiginous melanoma.
abstract: The authors report a case of a Latin American woman who developed progressive pigmentation primarily involving two digits of her right hand. She was scheduled for amputation based on a presumptive histologic diagnosis of melanoma with regression. Dermatology consultation with repeat biopsies disclosed a lichenoid tissue reaction with marked pigment incontinence and no evidence of melanoma. This report should prompt physicians to include lichen planus pigmentosus in the differential diagnosis of acral lentiginous melanoma.
authors.affiliation: Department of Dermatology & Cutaneous Surgery, University of South Florida, College of Medicine,Tampa, FL 33612, USA.
authors.forename: Kelly
authors.initials: K
authors.lastname: Bickle
authors.forename: Erica
authors.initials: E
authors.lastname: Smithberger
authors.forename: Mary H
authors.initials: MH
authors.lastname: Lien
authors.forename: Neil Alan
authors.initials: NA
authors.lastname: Fenske
mesh_terms: D003937:Diagnosis, Differential; D004890:Erythema / Q000175:diagnosis; D005260:Female; D006801:Humans; D017495:Hyperpigmentation / Q000175:diagnosis* / Q000473:pathology; D008010:Lichen Planus / Q000175:diagnosis* / Q000473:pathology; D008545:Melanoma / Q000175:diagnosis* / Q000473:pathology; D008875:Middle Aged; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000473:pathology