1. Congenital Osseous Anomalies of the Upper and Lower Cervical Spine in Children by James T. Guille, and Henry H. Sherk J Bone Joint Surg Am Volume 84(2):277-288 February 1, 2002 ©2002 by The Journal of Bone and Joint Surgery, Inc.

2. Sagittal magnetic resonance image showing the tip of the odontoid above the foramen magnum (white arrowhead) without brainstem compression as well as a syringomyelia (double arrowheads). James T. Guille, and Henry H. Sherk J Bone Joint Surg Am 2002;84:277-288 ©2002 by The Journal of Bone and Joint Surgery, Inc.

3. Figs. 2-A, 2-B, and 2-C A fifty-five-year-old woman with known life-long congenital fusions of the second and third and the fourth and fifth cervical vertebrae. James T. Guille, and Henry H. Sherk J Bone Joint Surg Am 2002;84:277-288 ©2002 by The Journal of Bone and Joint Surgery, Inc.

4. Figs. 2-A, 2-B, and 2-C A fifty-five-year-old woman with known life-long congenital fusions of the second and third and the fourth and fifth cervical vertebrae. James T. Guille, and Henry H. Sherk J Bone Joint Surg Am 2002;84:277-288 ©2002 by The Journal of Bone and Joint Surgery, Inc.

5. Magnetic resonance image showing degenerative disc changes at all levels (white arrowheads) with multiple disc protrusions (black arrowheads). James T. Guille, and Henry H. Sherk J Bone Joint Surg Am 2002;84:277-288 ©2002 by The Journal of Bone and Joint Surgery, Inc.

6. Figs. 3-A through 3-D An eight-year-old boy who presented with a so-called webbed neck. James T. Guille, and Henry H. Sherk J Bone Joint Surg Am 2002;84:277-288 ©2002 by The Journal of Bone and Joint Surgery, Inc.

7. Figs. 3-B and 3-C Flexion (Fig. 3-B) and extension (Fig. 3-C) radiographs showing congenital fusion from the second to the seventh cervical vertebra with a hypoplastic odontoid. James T. Guille, and Henry H. Sherk J Bone Joint Surg Am 2002;84:277-288 ©2002 by The Journal of Bone and Joint Surgery, Inc.

8. Figs. 3-B and 3-C Flexion (Fig. 3-B) and extension (Fig. 3-C) radiographs showing congenital fusion from the second to the seventh cervical vertebra with a hypoplastic odontoid. James T. Guille, and Henry H. Sherk J Bone Joint Surg Am 2002;84:277-288 ©2002 by The Journal of Bone and Joint Surgery, Inc.

9. Magnetic resonance image showing ample room for the cord at all levels. James T. Guille, and Henry H. Sherk J Bone Joint Surg Am 2002;84:277-288 ©2002 by The Journal of Bone and Joint Surgery, Inc.

10. Figs. 4-A, 4-B, and 4-C A ten-year-old girl who had congenital fusions of the second and third cervical vertebrae, the posterior elements of the third and fourth cervical vertebrae, and the fourth through seventh cervical vertebrae. James T. Guille, and Henry H. Sherk J Bone Joint Surg Am 2002;84:277-288 ©2002 by The Journal of Bone and Joint Surgery, Inc.

11. Figs. 4-A, 4-B, and 4-C A ten-year-old girl who had congenital fusions of the second and third cervical vertebrae, the posterior elements of the third and fourth cervical vertebrae, and the fourth through seventh cervical vertebrae. James T. Guille, and Henry H. Sherk J Bone Joint Surg Am 2002;84:277-288 ©2002 by The Journal of Bone and Joint Surgery, Inc.

12. Flexion magnetic resonance image showing encroachment of the anterior canal by aberrant vertebrae and disc material. James T. Guille, and Henry H. Sherk J Bone Joint Surg Am 2002;84:277-288 ©2002 by The Journal of Bone and Joint Surgery, Inc.