<prompt> Osteoclastoma arises from which pa of bone?EpiphysisMetaphysisDiaphysisAll the above  <response>: OSTEOCLASTOMA GIANT CELL TUMOUR Giant cell tumour GCT is a common bone tumour with variable growth potential. Though generally classified as benign, it tends to recur after local removal. The tumour is seen commonly in the age group of 20-40 years i.e., after epiphyseal fusion. The bones affected commonly are those around the knee i.e., lower-end of the femur and upper-end of the tibia. Lower-end of the radius is another common site. The tumour is located at the epiphysis. It often reaches almost up to the joint surface. Common presenting complaints are swelling and vague pain Reference: Maheshwari; Essential Ohopaedics; Page no: 237 