1. Excision for the Treatment of Periarticular Ossification of the Knee in Patients Who Have a Traumatic Brain Injury* by ERNESTO IPPOLITO, RITA FORMISANO, PASQUALE FARSETTI, ROBERTO CATERINI, and FRANCESCA PENTA J Bone Joint Surg Am Volume 81(6):783-9 June 1, 1999 ©1999 by The Journal of Bone and Joint Surgery, Inc.

2. Figs. 1-A through 1-D: Case 2. ERNESTO IPPOLITO et al. J Bone Joint Surg Am 1999;81:783-9 ©1999 by The Journal of Bone and Joint Surgery, Inc.

3. Fig. 1-B: After resection of the proximal part of the heterotopic bone (arrows), the patella (arrowheads) could move freely along the femoral trochlea. ERNESTO IPPOLITO et al. J Bone Joint Surg Am 1999;81:783-9 ©1999 by The Journal of Bone and Joint Surgery, Inc.

4. Fig. 1-C: The heterotopic bone was completely removed from the medial surface of the femoral condyle (asterisks). ERNESTO IPPOLITO et al. J Bone Joint Surg Am 1999;81:783-9 ©1999 by The Journal of Bone and Joint Surgery, Inc.

5. Fig. 1-D: The two parts of the resected heterotopic bone, which, together, measured twelve by ten by three centimeters. ERNESTO IPPOLITO et al. J Bone Joint Surg Am 1999;81:783-9 ©1999 by The Journal of Bone and Joint Surgery, Inc.

6. Figs. 2-A through 2-F: Case 4, a thirty-three-year-old man who had heterotopic ossification of the right knee. ERNESTO IPPOLITO et al. J Bone Joint Surg Am 1999;81:783-9 ©1999 by The Journal of Bone and Joint Surgery, Inc.

7. Figs. 2-A, 2-B, and 2-C: Preoperative anteroposterior (Fig. 2-A), lateral (Fig. 2-B), and axial (Fig. 2-C) radiographs. ERNESTO IPPOLITO et al. J Bone Joint Surg Am 1999;81:783-9 ©1999 by The Journal of Bone and Joint Surgery, Inc.

8. Figs. 2-A, 2-B, and 2-C: Preoperative anteroposterior (Fig. 2-A), lateral (Fig. 2-B), and axial (Fig. 2-C) radiographs. ERNESTO IPPOLITO et al. J Bone Joint Surg Am 1999;81:783-9 ©1999 by The Journal of Bone and Joint Surgery, Inc.

9. Figs. 2-D, 2-E, and 2-F: Postoperative anteroposterior (Fig. 2-D), lateral (Fig. 2-E), and axial (Fig. 2-F) radiographs showing no recurrence of heterotopic bone. ERNESTO IPPOLITO et al. J Bone Joint Surg Am 1999;81:783-9 ©1999 by The Journal of Bone and Joint Surgery, Inc.

10. Figs. 2-D, 2-E, and 2-F: Postoperative anteroposterior (Fig. 2-D), lateral (Fig. 2-E), and axial (Fig. 2-F) radiographs showing no recurrence of heterotopic bone. ERNESTO IPPOLITO et al. J Bone Joint Surg Am 1999;81:783-9 ©1999 by The Journal of Bone and Joint Surgery, Inc.

11. Figs. 2-D, 2-E, and 2-F: Postoperative anteroposterior (Fig. 2-D), lateral (Fig. 2-E), and axial (Fig. 2-F) radiographs showing no recurrence of heterotopic bone. ERNESTO IPPOLITO et al. J Bone Joint Surg Am 1999;81:783-9 ©1999 by The Journal of Bone and Joint Surgery, Inc.

12. Figs. 3-A, 3-B, and 3-C: Case 5. ERNESTO IPPOLITO et al. J Bone Joint Surg Am 1999;81:783-9 ©1999 by The Journal of Bone and Joint Surgery, Inc.

13. Figs. 3-A, 3-B, and 3-C: Case 5. ERNESTO IPPOLITO et al. J Bone Joint Surg Am 1999;81:783-9 ©1999 by The Journal of Bone and Joint Surgery, Inc.

14. Figs. 3-A, 3-B, and 3-C: Case 5. ERNESTO IPPOLITO et al. J Bone Joint Surg Am 1999;81:783-9 ©1999 by The Journal of Bone and Joint Surgery, Inc.