<prompt> Babu a 19-year-old male has a small circumscribed sclerotic swelling over diaphysis of femur; likely diagnosis is:OsteoclastomaOsteosarcomaEwings sarcomaOsteoid osteoma  <response>: d Osteoid osteoma- Well circumscribed sclerotic swelling over diaphysis of a long bone femur in a 19 years old suggests the diagnosis of osteoid osteoma. 