Osteochondroma is a noncancerous growth of cartilage and bone. (“Osteo” means bone, “chondro” means cartilage and “oma” means tumor.) It's the most common kind of benign bone tumor. It usually appears near the ends of long bones, where new bone growth occurs in children and teens.

Osteochondroma is the most common benign bone tumor in children. Because an osteochondroma often displays no symptoms, the tumor may only be discovered when a child notices a bump, or reports pain. For some children, the osteochondroma may never be discovered.

Osteochondromas are benign chondrogenic lesions derived from aberrant cartilage from the perichondral ring that may take the form of solitary osteochondroma, or Multiple Hereditary Exostosis. Patients typically present between the ages of 10 and 30 with a painless mass.

An osteochondroma is a benign (noncancerous) tumor that develops during childhood or adolescence. It is an abnormal growth that forms on the surface of a bone near the growth plate. Growth plates are areas of developing cartilage tissue near the ends of long bones in children.

What is osteochondroma? An osteochondroma, also known as an osteocartilaginous exostosis, is one of the most common benign bone tumors. This type of tumor is continuous with the underlying bone − meaning that both the tumor and healthy bone share the same hollow cavity that contains the bone marrow.