Rare Case of Primary Sarcomatous Transformation of Giant Cell Tumour

Giant cell tumors of bone, also known as osteoclastomas, are relatively common bone tumors and are usually benign. Malignant transformation of GCT can either be primary or secondary, secondary being much more common than primary. Here we present a case of primary sarcomatous transformation of giant cell tumour of the distal humerus in a 42 year old man with probable lung and vertebral metastasis.