Severe Osteoarthritis of the Knee as an Early Symptom of Alkaptonuria: A Case Report

Introduction: Alkaptonuria (AKU) is a very rare disease and occurs due to the deficiency of the enzyme homogentisate1, 2-dioxygenase (HGD) which results in ochronosis, a term used to describe the dark pigmentation of the tissues. Alkaptonuria affects mostly the knee joint followed by the hip as major weight bearing joints, where the life quality of such patients is severely affected. Case Presentation: We present a case of Caucasian male who was...