Radiographic and autopsy findings. A) CT scan showing large intrapelvical tumor. B) The macroscopic view of the intrapelvical tumor at autopsy. C) Metastatic nodules in myocardium. D) Intrapelvical tumor found at autopsy histologically showed picture of osteosarcoma composed of atypical, oval to spindle cells, partly rimmed with osteoid. Multinuclear giant, osteoclast-like tumor cells were also visible (HE, × 200).