1. Injury to the Colon During Revision Total Hip Arthroplasty by Lindsey S. Hagstrom, Dennis J. Callahan, and James W. Green JBJS Case Connect Volume os-90(4):881-884 April 1, 2008 ©2008 by The Journal of Bone and Joint Surgery, Inc.

2. An anteroposterior pelvic radiograph demonstrating osteolysis adjacent to the screw holes of the right acetabular component (upper arrows) and the proximal femoral component (lower arrows). Lindsey S. Hagstrom et al. J Bone Joint Surg Am 2008;os- 90:881-884 ©2008 by The Journal of Bone and Joint Surgery, Inc.

3. Preoperative pelvic computed tomographic scan demonstrating the osteolytic lesions adjacent to the screw holes (indicated by the two thin black arrows at the top of the figure). Lindsey S. Hagstrom et al. J Bone Joint Surg Am 2008;os- 90:881-884 ©2008 by The Journal of Bone and Joint Surgery, Inc.

4. An axial section from the Visible Human Project (U.S. National Library of Medicine), depicting: (1) femoral head, (2) acetabulum, (3) colon, (4) iliac muscle, (5) internal obturator muscle. Lindsey S. Hagstrom et al. J Bone Joint Surg Am 2008;os- 90:881-884 ©2008 by The Journal of Bone and Joint Surgery, Inc.