Extraskeletal osteochondroma within the iliopsoas muscle: case report.

Osteochondromas, occurring usually in the metaphyses of long bones, are among the most frequent benign musculoskeletal neoplasms and both their sporadic and hereditary variants have been studied extensively. Extraskeletal osteochondromas, however, are much less common. They have been shown to arise near joints or synovial spaces of feet, hands, or bursae. Herein, we present a very rare case of an extraskeletal osteochondroma within the iliopsoas muscle.