1. Early Clinical and Radiographic Characteristics in Fibrodysplasia Ossificans Progressiva by Kenichi Mishima, Hiroshi Kitoh, Takenobu Katagiri, Hiroshi Kaneko, and Naoki Ishiguro JBJS Case Connect Volume os-93(10):e52 May 18, 2011 ©2011 by The Journal of Bone and Joint Surgery, Inc.

2. Photographs and anteroposterior radiographs of the left foot of the first patient (Case 1) at the age of eleven months (A and B) and the second patient (Case 2) at the age of 7.1 years (C and D), demonstrating marked hallux valgus. Kenichi Mishima et al. J Bone Joint Surg Am 2011;os- 93:e52 ©2011 by The Journal of Bone and Joint Surgery, Inc.

3. Anteroposterior radiographs of the left hand of the first patient (Case 1) at the age of eleven months (A) and the second patient (Case 2) at the age of 8.4 years (B), showing shortening of the first metacarpal. Kenichi Mishima et al. J Bone Joint Surg Am 2011;os- 93:e52 ©2011 by The Journal of Bone and Joint Surgery, Inc.

4. Lateral radiographs of the cervical spine of the first patient (Case 1) at the age of eleven months (A) and the second patient (Case 2) at the age of 7.6 years (B), demonstrating hypertrophy of the laminae and spinous processes of the cervical vertebrae. Kenichi Mishima et al. J Bone Joint Surg Am 2011;os- 93:e52 ©2011 by The Journal of Bone and Joint Surgery, Inc.

5. Anteroposterior radiographs of the lower limb of the first patient (Case 1) at the age of eleven months (A and C) and the second patient (Case 2) at the age of 7.1 years (B and D). Kenichi Mishima et al. J Bone Joint Surg Am 2011;os- 93:e52 ©2011 by The Journal of Bone and Joint Surgery, Inc.