title: Lichen planus subtropicus.
abstract: Among all the clinical varieties of lichen planus that have been reported in literature, a unique and clinically distinct type is seen in the Middle East countries. The lesions are annular, usually develop on the exposed parts of the body, and worsen by exposure to the sun. I describe this condition based on observation of 20 cases and review the literature.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007493:Iraq; D008010:Lichen Planus / Q000453:epidemiology / Q000473:pathology; D008297:Male; D008875:Middle Aged