Blue discoloration of the skin and cartilage, or ochronosis, is a rare physical examination finding. We present two cases of childhood onset ochronosis, one exogenous and one endogenous in etiology. The first was caused by minocycline use for severe acne, and the second was caused by congenital alkaptonuria.
Keywords: alkaptonuria; blue; cartilage; ears; nails; ochronosis.
© 2022 The Authors. Clinical Case Reports published by John Wiley & Sons Ltd.