Lichen planus pigmentosus presenting as diffuse facial melanosis.

Lichen planus pigmmentosus (LPP), an uncommon variant of lichen planus, has been characterized by hyperpigmented, dark brown macules in sun-exposed areas and flexural folds. In this paper, an unusual case of LPP showing diffuse darkening of the face without the presence of any lichenoid or macular lesion is presented.