Multiple enchondromatosis (Ollier disease)

A) Hand – Observe the geographic, expansile, soap-bubble lesions affecting nearly every bone visualized within the hand. Slight matrix calcification is noted in the metacarpal bones.
B) Foot – Observe the multiple, geographic, expansile lesions scattered throughout the proximal phalanges of the foot. The first metatarsal and the diaphysis of the fourth metatarsal also contain expansile enchondromas. The expansion of bone has widened the diaphysis of most of the affected bones.