Question
How many types can hidden spinal dysraphism be classified into?
Answer
Hidden spinal dysraphism can be classified into two types, namely Type I and Type II. Type I refers to the spinal cord being split into two at the site of the spinal dysraphism, with each having its own dura mater and arachnoid membrane. These two structures are separated by fibrous, cartilaginous, or bony spurs, causing the spinal cord to be pulled and resulting in clinical symptoms, accounting for about 50%. Type II refers to the spinal cord being split into two at the site of the spinal dysraphism but sharing a common dura mater and arachnoid membrane. There is no foreign body pulling on the spinal cord, and no clinical symptoms are produced.