Chondromas are noncancerous tumors made of cartilage, and are usually found in the bones of the hands, feet, upper arm and upper leg bones. The different types of chondromas are named by the parts of the bone where they appear and include periosteal (bone surface), soft tissue (tendons and joint capsule), endochondroma (inside of bone), and osteochondroma (grown out from bone). Periosteal chondromas mainly occur in persons younger than 30, while soft tissue chondromas tend to develop in middle age. The cause of chondromas is unknown.

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Periosteal chondromas sometimes cause swelling and dull pain. Some chondromas can be felt and seen through the skin, appearing as lumps. Chondromas of the fingers and toes may cause pain. However, most chondromas are not painful.

Chondromas are treated with surgical removal.

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