Fig. 2From: A novel mutation of COL2A1 in a large Chinese family with avascular necrosis of the femoral headA, B The X-ray and MRI revealed that collapsed femoral heads with cystic degeneration, and premature hip osteoarthritis in both hips of the proband (IV9). C Post-operation radiograph. D, E The X-ray of the patient's spine indicated normal vertebraeBack to article page