From Wikipedia, the free encyclopedia
Jump to: navigation, search
Classification and external resources
Osteochondroma X-ray.jpg
Lateral radiograph of the knee demonstrating ossification in the peritendinous tissues in a patient with osteochondroma.
ICD-10 D16
ICD-O: 9210/0
DiseasesDB 34033
eMedicine article/1256477
MeSH D015831

Osteochondroma is a type of benign tumor that consists of cartilage and bone.[1] It is a benign cartilage-capped outgrowth, connected to bone by a stalk, known as a peduncle.

It is the most frequently observed neoplasm of the skeleton.

They generally occur at the end of the growth plates of long bones, often at joints. They most commonly form at the shoulder or the knee but have been known to occur in the long bones of the forearm (i.e. the radius and ulna).

Osteochondroma, one of the most common benign bone tumors, takes the form of a cartilage-capped bony spur or outgrowth on the surface of the bone. It is sometimes referred to as osteocartilaginous exostosis. When an exophytic bone lesion contains a cartilaginous cap greater than one centimeter in height, or if there is associated pain, there is thought to be a higher risk for the lesion representing a chondrosarcoma.


On most occasions the tumors grow outward from the legs or arms. However, very few cases have been reported with the bone spur growing inward, sometimes requiring surgery. Osteochondromatosis is a condition involving a proliferation of osteochondromas.


Surgical extraction of osteochondromas is sometimes beneficial. Shown is an osteochondroma surgically extracted from a ten-year-old patient. The bone is the cylindrical stalk at the bottom, about 1/2 inch long, the two diagonal growths are cartilage. This morphology is typical of a tibial bone spur.

Osteochondromas are most often, upon diagnosis, simply monitored through periodic x-rays. Those tumors that grow large enough to irritate surrounding muscles, tendons, or tissues are usually removed by surgery.

See also[edit]


External links[edit]