Lichen dyschromicum perstans.
A disorder of hyperpigmentation is described which is seen commonly in middle aged individuals. Face and neck including upper part of the trunk are mostly affected. The lesions are usually bilaterally symmetrical and occur in a localized or generalized distribution. Oral mucosa is infrequently involved. The colour of pigmentation varies from grey, blue and brown to black and it persists for years. None of the patients had any features of lichen planus. Histopathology reveals varying rates of lichenoid tissue reactions. We have tentatively designated this disorder as lichen dyschromicum perstans. Its relationship with other similar disorders is discussed.
Kanwar
A J
AJ
Department of Dermatology, Venereology and Leprology, Postgraduate Institute of Medical Education and Research, Chandigarh-160012, India.
Dawn
G
G
Dhar
S
S