Alkaptonuria- a rare metabolic disorder

A 26-year-old male presented with bluish discoloration of both pinnae and history of arthritis for the last few months. Examination showed bluish pigmentation of both pinnae, rest of the examination was unremarkable. Urine examination for the diagnosis of alkaptonuria was positive; however no radiological changes were seen at this stage of the disease. No other systemic abnormality or complication detected.