Beware of giant cell tumour - a case report

This case presents diagnostic problems encountered with a 20 year old man who presented with pain and a flexion deformity of the knee caused by a giant cell tumour of lower end of the femur. On initial presentation, the knee radiographs were considered normal and the patient was treated for internal derangement of the knee. The diagnosis of giant cell tumour was established after six months when the knee radiograph indicated a bony lesion in the medial condyle of the femur extending into the popiteal space. The purpose of this case presentation is to remind orthopaedic physicians of the possible existance of giant cell tumour formation in the interspacial area of the knee