Osteochondromas, or osteocartilaginous exostoses, are the most common primary benign bone tumors and usually occur in the metaphyses of long bones.

• 骨软骨瘤，或称骨软骨外生骨疣，是最常见的原发性良性骨肿瘤，通常发生于长骨的干骺端。