Osteochondroma

A tumour containing both bony and cartilaginous cells.

A noncancerous, tumorlike lesion formed by a bony protrusion covered with cartilage. Osteochondroma, which is most common in people younger than 20, may form as a single lesion or as several lesions that are painless and slow growing. Sometimes the protrusions appear after an injury. They most commonly are found in tubular bones, including the thighbone, shinbone, or ribs, but may also occur in the pelvis. An osteochondroma generally stops growing when the bone is fully developed.

A bone tumor composed of cartilage-forming cells. It appears as a painless mass, usually at the end of a long bone, and is most common between the ages of 10 and 25. As a small proportion of these tumors become malignant if untreated, they are excised.

A tumor composed of both cartilaginous and bony substance.

An benign bone tumor, known as an osteochondroma, emerges from a bony stalk topped with cartilage and presents as a firm, rounded bulge near a joint. Osteochondromas tend to develop during late childhood and early adolescence, generally originating from the side of a long bone near the knee or shoulder. These growths only become problematic if they disrupt the movement of tendons or the joint in the vicinity. In such cases, surgical removal might be required. More sizable osteochondromas can impede skeletal growth and potentially lead to deformity.