Narrowed brain veins after surgery at the back of the head
Original title: Postoperative venous sinus stenosis after retrosigmoid craniotomy: systematic review and illustrative case.
How far along is this research?
- Lab cells
- Animals
- Review
- Tested in people
This looks across many earlier studies rather than running a new one.
This looks back at studies already done and one patient's case, not a new trial.
The short version
Some people get a narrowed brain vein after this kind of surgery, and a small tube may help fix it.
What was studied. Researchers gathered thirty-three past studies covering 4,893 patients who had surgery at the back of the skull. They looked at how often the large veins that drain blood from the brain got blocked or narrowed. They also shared one patient's story.
What they found. A blood clot in these veins was reported in 429 of 4,237 patients. Narrowing of a vein was found in 135 of 784 patients in the studies that looked for it. A vein was injured during surgery in 55 of 1,618 patients. Only 16 patients had a procedure done through a blood vessel, and 13 of them got a small mesh tube called a stent.
What this means, and what it doesn't
What it could mean: Vein problems after this surgery may happen more often than doctors once thought. Most people have no symptoms. But if pressure builds up inside the head, a narrowed vein could be the reason. In the one case shared here, a 28-year-old woman got a stent. Her blood flow improved, and she was still doing well at her 12-month check.
What it doesn't mean: This is not a cure, and it is not new treatment you can ask for today. It is a look back at studies that were already done, plus one patient's story. Only 16 patients in all those studies had this kind of procedure. That is far too few to know how well it works or who it helps. The authors say bigger studies that follow people over time are still needed. Serious vein blockage after this surgery is still uncommon.
Source: PubMed, October 8, 2026 · Read the original
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