Extensive cervicothoracic posterior arch defects from C1 to T6 leading to myelopathy due to thoracic kyphosis in an adolescent boy.

Purpose: Limited dorsal myeloschisis, a form of cervical spinal dysraphism, is a rare anomaly and is typically associated with spinal cord tethering. The objective is to illustrate a rare dysraphic anomaly in the cervicothoracic spine causing myelopathy, not due to tethering but secondary to progressive kyphosis. To our knowledge, such an anomaly has not been described in the literature.