A chondroblastoma is a rare type of benign bone tumor that originates from cartilage.
Enchondromas are the most common type of hand tumor. Although they may affect people of any age, they are most common between ages 10 and 20.
Giant Cell Tumor
Giant cell tumors most often appear in the knee, but they can also involve the bones of the arms and the legs, or the flat bones such as the breastbone or pelvis.
Osteochondroma is an overgrowth of cartilage and bone near the end of the bone near the growth plate.