A case of palmoplantar lichen planus mimicking secondary syphilis.

Lichen planus is a chronic inflammatory disease that affects skin, mucous membranes, hairs, and nails. According to the site of involvement, lichen planus can be subdivided into palmoplantar, mucosal, nail, or scalp types. Palmoplantar lichen planus is a rare subtype of lichen planus which may create difficulty in diagnosis, as the lesion is limited to the palms and soles. We report a case of a 37-year-old male with lichen planus who presented with multiple erythematous, scaly, hyperkeratotic papules on his palms and soles mimicking secondary syphilis.