Fig.2

A male patient, diagnosed with pelvic MBGCT (Enneking Zone II + III, type2 defects). A: preoperative X-ray indicates tumor located at the right side of acetabulum; B: preoperative CT scan indicates the tumor involved the lower part of the acetabular; C, D: preoperative MR images indicate huge soft tissue mass involved acetabulum and ischium; E: intraoperative image showed the tumor was completely removed with dome of the acetabular reserved; F: intraoperative image showed the acetabular was reconstructed with tantalum component and bone cement; G: X-ray image of the resected tumor; H: pelvic X-ray at 1-year postoperatively indicates a stable internal fixation and alignment