Imaging of Congenital Spine Malformations.

Congenital malformations of the spine and spinal cord are a large and diverse group of diagnoses, which are often broadly referred to as spinal dysraphisms (SDs). Derived from the Greek words dys (bad) and raphe (suture), the term dysraphism describes missteps in the process of forming a midline seam during the zipper-like fusion of the neural folds in primary neurulation. As such, the term "spinal dysraphism" is a designation that should technically be reserved for malformations resulting from aberrations in primary neurulation. In medical practice, however, it is a catch-all designation regularly used to describe any of the numerous abnormalities demonstrating incomplete midline closure of mesenchymal, osseous, and nervous tissue, occurring at any point during embryologic development. For the sake of clarity and completeness, this article will also include that breadth in the discussion of congenital abnormalities of the spine.