Extraskeletal Osteochondroma of the Leg

steochondroma is the most common benign bone tu-mor. Typically, it arises from the metaphysis of a long bone near the physis during periods of rapid skeletal growth. Less commonly, osteochondroma may originate from the synovium and para-articular regions1. In very rare in-stances, histologically similar osteocartilaginous lesions occur in soft tissues away from any bone or joint; these are referred to as extraskeletal osteochondromas (ESOCs)2. ESOC is an un-common, slow-growing, painless osteocartilaginous lesion, with the highest incidence in the hands and feet3. ESOCs have also been reported in the buttocks, the thigh, the skin, the ankle, the knee, the cerebrum, and the nape of the neck. The peak incidence is in the third and sixth decades of life3-7. To the best of our knowledge, ESOC previously has not been reported in the leg. This case report describes an ESOC in th