Communicating syringomyelia

What it is

Communicating syringomyelia is a form of syrinx that communicates (connects) with the cerebrospinal fluid spaces — for example, through a dilated central canal connecting with the fourth ventricle or CSF pathways. It is associated with conditions affecting CSF flow.

Understanding Communicating syringomyelia

In communicating syringomyelia, the fluid cavity within the cord is connected to the CSF spaces, often through the central canal. This form is classically associated with conditions involving the CSF pathways and craniocervical junction, including some related to Chiari and to conditions affecting CSF circulation (such as prior hydrocephalus or developmental anomalies). It contrasts with non-communicating syringomyelia, where the syrinx does not connect with the CSF spaces. The distinction can have implications for understanding the mechanism and, in some cases, the approach to treatment. In practice, the classification is one of several ways syrinxes are described. Understanding communicating syringomyelia clarifies one category of syrinx based on its connection with the CSF spaces.

Why it matters

Understanding communicating syringomyelia helps families see one way syrinxes are categorized — by whether they connect with the CSF spaces — which can inform understanding of the mechanism and approach.