Giant cell rich osteosarcoma: A rare case report

Giant cell-rich osteosarcoma is an extremely rare variant of conventional osteosarcoma. It accounts for only 1%-3%. It is an undifferentiated high-grade sarcoma with numerous osteoclast-like giant cells. It also contains variable amount of tumor osteoid. This article aims to present a rare case of Giant cell-rich osteosarcoma involving the right knee joint in a young man.