This disease is: (A) Osteochondrosis of the lunate, (B) Osteochondrosis of the navicularq, (C) Tuberculosis of the scaphoid, (D) Syphilitic dactylitis
Answer is B. Osteochondrosis of the tarsal navicular (Kohler's disease) is characterised by aseptic necrosis of the Navicular bone causing a painful limp in a child usually 4-10 years of age.