1. Extraskeletal Osteosarcoma of the Hand in an Adolescent by Davi Gabriel Bellan, Reynaldo Jesus-Garcia, Maria Teresa de Seixas Alves, Marcelo de Toledo Petrilli, Antonio Sérgio Petrilli, Marcos Korukian, Dan Carai Maia Viola, Murillo Ferri Schoedl, and Andreza Almeida Senerchia JBJS Case Connect Volume 3(1):e6 January 23, 2013 ©2013 by The Journal of Bone and Joint Surgery, Inc.

2. Clinical photograph of the left hand: palmar view. Davi Gabriel Bellan et al. JBJS Case Connect 2013;3:e6 ©2013 by The Journal of Bone and Joint Surgery, Inc.

3. Anteroposterior radiograph of the hand and wrist. Davi Gabriel Bellan et al. JBJS Case Connect 2013;3:e6 ©2013 by The Journal of Bone and Joint Surgery, Inc.

4. Axial T1 (Fig. 3-A) and T2 (Fig. 3-B) magnetic resonance images of the hand. Davi Gabriel Bellan et al. JBJS Case Connect 2013;3:e6 ©2013 by The Journal of Bone and Joint Surgery, Inc.

5. Figs. 4-A and 4-B The surgical procedure for tumor resection consisted of partial amputation of the ulnar rays of the hand and wrist. Davi Gabriel Bellan et al. JBJS Case Connect 2013;3:e6 ©2013 by The Journal of Bone and Joint Surgery, Inc.

6. Figs. 5-A, 5-B, and 5-C Arthrodesis of the wrist. Davi Gabriel Bellan et al. JBJS Case Connect 2013;3:e6 ©2013 by The Journal of Bone and Joint Surgery, Inc.

7. Fig. 6 Photomicrographs of the osteosarcoma of the hand demonstrate sarcomatous cells with atypical mitosis (hematoxylin and eosin, 400× magnification) (Fig. 6-A) and osteoid and anaplastic cells (hematoxylin and eosin, 400× magnification) (Fig. 6-B). Davi Gabriel Bellan et al. JBJS Case Connect 2013;3:e6 ©2013 by The Journal of Bone and Joint Surgery, Inc.

8. Figs. 7-A through 7-D The final clinical function of the remaining hand is demonstrated. Davi Gabriel Bellan et al. JBJS Case Connect 2013;3:e6 ©2013 by The Journal of Bone and Joint Surgery, Inc.