Figure 4From: Identification of a novel COL2A1 mutation (c.1744G>A) in a Japanese family: a case report Computed tomography findings of the femoral head. Coronal (A) and axial (B and C) CT images of the right femoral head show a concave articular surface and a free body in the hip joint of the left femoral head. The free body is spherical and has a smooth surface.Back to article page