It originates from chondroblasts, hence the name. It occurs in about 1% of bone tumors in the United States. Typically, it causes muscle deterioration, decreased movement in joints and pain. Found in patients from the age of 3-73. Also known as CODMAN'S TUMOR.
Without surgical extirpation, the tumor may extend into distant organs. Metastasis is very unusual and usually involves the lungs and tends to occur at the time of primary tumor recurrence. Relatively high rate of tumor recurrence (10-35%) has been reported for chondroblastomas.