As a child grows, a solitary osteochondroma may develop if bone grows out from the growth plate instead of in line with it. Solitary osteochondromas are commonly found at the end of long bones where they meet to form joints, such as the knee, hip, and shoulder.

What is the cause of osteochondroma?

The cause of osteochondroma is unknown, but the tumor is thought to be related to an abnormality in the growth plate, causing a bony prominence to grow away from the bone.

What causes osteochondroma in adults?

The exact cause of osteochondroma is unknown. It does not result from injury. Both males and females are equally likely to develop it. Osteochondromas are thought to be associated with a gene called EXT 1.