Case report: solitary pelvic osteochondroma presenting with L3 nerve root compression.

Osteochondroma is the most common benign bone tumor, comprising 40% of benign bone tumors. Typically they are found in adolescents growing on long bones such as the femur or radius and are clinically obvious. Very rarely, osteochondromas grow in the pelvis where they can reach a large size and present in more subtle ways.