Figure Legend
Figure 1: Preoperative CT exam of the pelvis revealed an aggressive mass involving the right ilium (arrow) and lateral sacrum (arrowhead).
Figure 2: Histopathologic image (hematoxylin and eosin stain) of the tumor exhibiting moderate pleomorphism and moderate mitotic activity with no undifferentiated areas - consistent with a grade II chondrosarcoma (10x magnification; bar = 100µm)
Figure 3: Lateral and ventrodorsal pelvic radiographs twenty-seven days following iliectomy pelvic radiographs demonstrated an overlapping fracture of the left pubic bone as well as corresponding fracture of the left ischial arch with evidence of callus formation over the fracture sites.
Figure 4: CT image of the pelvis fifty-three days after iliectomy for marginal excision of ilial chondrosarcoma. A portion of the prolene mesh can be seen as a linear serpiginous region of hyperattenuation (arrow).
Figure 5: Pelvic radiographs 488 days post-iliectomy revealing new bone formation within the right hemipelvis region where the hemipelvectomy was performed cranial to the coxofemoral joint. The prolene mesh implant can be visualized. The right proximal femur is slightly more osteopenic compared to the left.