Benign painful cartilaginous tumour in adolescents in metaphysis of long bones (most commonly tibia); M>F; produces slowly progressing swelling, tenderness and pain.
Locally destructive with a high (25%) recurrence rate.
X-ray – eccentric radiolucent defect with no calcification. Adjacent cortex may be thinner or absent. Usually has a sclerotic and scalloped rim.
Treatment – curettage or wide excision