Congenital Cervical Block Vertebrae with Myelopathy: Report of 5 Cases

Abstract

Isolated congenital cervical block vertebrae, known as the Type 2 Klippel-Feil syndrome, is rarely presented with symptoms of spondylotic myelopathy. Here, we report on 5 patients who developed spondylotic myelopathy. Not only the adjacent nonfused segments but also the other nonfused segments may became hypermobile and subject to significantly increased stress. For multilevel spondylosis, laminoplasty is effective treatment. This has the advantage of both decompression and the preservation of some cervical movement.