Exogenous ochronosis after prolonged use of topical hydroquinone (2%) in a 50-year-old Indian female
Ochronosis is a rare disease characterized by speckled and diffuse pigmentation symmetrically red prairie spy apple over the face, neck, and photo-exposed areas.It is characterized histologically by banana-shaped ochre-colored deposits in the dermis.It can present in exogenous navy blue maang tikka or endogenous form.We report a case of exogenous o