Synovial chondromatosis of the cubometatarsal joint.

A plain radiograph showed discrete areas of calcification around the cuboid and bases of his 4th and 5th metatarsals, with scalloping of the cuboid in keeping with a long standing pressure effect (fig. 1); these features were reported as being consistent with synovial chondromatosis. Magnetic resonance imaging (MRI) confirmed the diagnosis by revealing multiple foci of low signal intensity surrounded by fluid (fig. 2). The cubometatarsal joint was later explored, a myriad of loose bodies of approximately 5 mm in size were removed, and an open synovectomy done. Histopathology confirmed synovial chondromatosis. When reviewed after four weeks he was pain free with a full range of movement.