Erythrokeratodermia progressivum symmetricum.

A case of progressive symmetric erythrokeratodermia (PSEK) in an Indian male is being reported. He presented with slowly progressive bilateral symmetrical plaques with peripheral rim of erythematous halo, which were limited only to the limbs. Koebner's phenomenon was positive. Family history was negative. Histopathology ruled out psoriasis and confirmed the diagnosis of PSEK.