Epiphyseal giant cell tumour in an immature skeleton.

It is well known that giant cell tumours of the bone rarely occur below the age of 20 years. Many radiologists and orthopaedicians do not even consider giant cell tumours as a differential diagnosis from a lytic lesion before epiphyseal closure. This is a rare case report of a 14-year-old girl with proven giant cell tumour of the epiphysis of the distal femur.