What Is Syringomyelia and Can It Be Treated?

Syringomyelia is a fluid-filled cavity inside the spinal cord. Not around it. Inside it. It forms because cerebrospinal fluid can’t circulate properly, so pressure builds and the fluid carves out a space in the cord itself. Over time that space grows. The nerve fibres carrying pain, temperature and movement take the damage. And here’s the part worth knowing: it’s treatable. The approach is almost never to drain the cyst. It’s to find what’s blocking the fluid and fix that. Correct the cause and the cavity often shrinks on its own.

According to Dr. Gurneet Singh Sawhney, a leading spine specialist in Mumbai, the cyst is not the disease, it’s the sign that fluid is going where it shouldn’t, and treating the sign without fixing the cause almost always falls short. Get the flow right and the cord starts doing its own repair.

The fluid accumulates and the cord gets stretched. Which fibres suffer depends on exactly where the cavity forms.

Chiari: the skull base is simply too crowded, the tonsils block the foramen magnum, CSF backs up, and a syrinx forms

Other causes: cord injuries, tumours, spinal scarring and tethered cord all create the same obstruction, each through a different mechanism

Sensation: a cape-like loss of pain and temperature sensation is the hallmark, often first noticed when a burn on the hand draws no response

Progression: if the cavity keeps expanding, weakness, spasticity and scoliosis follow, the last being especially common in children

Symptoms accumulate slowly, over years sometimes, which is why by the time a patient presents the deficit is already established. Early involvement through spine surgery assessment is what changes that trajectory.

Treat the obstruction, not the cyst. That principle runs through every surgical option.

Chiari decompression: the posterior fossa is opened through brain surgery so the tonsils stop blocking the outflow, and the syrinx typically shrinks without further intervention

Untethering: a cord anchored too tightly at its base is released, restoring the slack the fluid needs to circulate normally

Shunting: if no fixable cause is identified, a thin catheter drains the cyst directly, effective but a second-line choice compared to treating the root cause

Watching: a stable, asymptomatic syrinx earns observation rather than an operation, since the risks of surgery only make sense when the condition is actively progressing

So treatment is possible for most, but knowing when to intervene matters as much as knowing how. This piece on when syringomyelia needs surgery covers that threshold in detail.

Dr. Gurneet Singh Sawhney is a functional and craniovertebral neurosurgeon with fellowship training from Japan and over 18 years of experience in cord and skull-base surgery, syringomyelia among the conditions he manages regularly. His work spans posterior fossa decompression and spinal cord surgery, the two procedures this condition most frequently demands.

Patients treated before significant damage accumulates usually hold on to the strength and sensation they still have. Some recover function they had already started to lose. Surgery is not a guarantee of either outcome, but the earlier it is performed, the more there is to protect and the better the chances of meaningful improvement.

Reference:

1. Syringomyelia, National Institute of Neurological Disorders and Stroke
2. Optimizing Therapeutic Strategies for Syringomyelia: A Comprehensive Review, National Library of Medicine (PMC)

Disclaimer: The information shared in this content is for educational purposes only and not for promotional use.