Lichen planus pigmentosus

Abstract

Lichen planus pigmentosus (LPP) is a rare variant of lichen planus (LP), reported in various ethnic groups. It occurs predominantly in female in the third or fourth decade of life, characterized by insidious onset of dark-brown macules in sun exposed areas and flexural folds. The differential diagnosis may occur with drug-induced pigmentation, photosensitization and vitamin deficiency like pellagra. Here we describe a case of a 51-year-old Moroccan man, working as a gardener, who presented an asymptomatic, non itching pigmented lesion on his face and neck. He had no history of trauma or medication use, and no preceding erythema or scaly skin eruption.

Keywords

• lichen planus
• lichen pigmentosus