Orthopaedics Giant Cell Tumor (GCT) or Osteoclastoma 14d60e7c Epiphysis involved in which bone tumor - A Osteosarcoma B Multiple myeloma C Giant cell tumor D Ewing's sarcoma High-Yield Explanation Ans. is 'c' i.e., Giant cell tumor o Epiphyseal tumors are : Chondroblastoma. Giant cell tumor (osteoclastoma), Clear cell chondrosaroma.