A glowing dye used during awake brain tumor surgery
Original title: 5-Aminolevulinic Acid-Guided Glioma Resection During Awake Craniotomy: Systematic Review of Functional Safety and Surgical Benefit.
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.
The dye and awake surgery are both used in people today, but using them together is not proven yet.
The short version
Doctors used a dye that makes tumor tissue glow while patients stayed awake.
What was studied. Researchers pooled results from ten studies of awake brain tumor surgery. The studies covered 108 patients. Patients were given a dye called 5-ALA: A medicine you are given before some brain operations. The tumor soaks it up. Under a special light the tumor then glows, so the surgeon can see where it stops and healthy brain starts. See the glossary that makes tumor tissue glow.
What they found. The tumor glowed in 79.2% of people with high grade glioma: A tumor that starts in the glial cells. Those are the support cells of the brain and spinal cord. Gliomas are given a grade from 1 to 4. The grade says how the tumor is expected to act. See the glossary and 24.1% of people with low grade glioma. Surgeons took out all the tumor they could see in 62.2% of patients with usable data. Speech trouble that went away later happened in 32.6% of patients. Lasting speech trouble happened in 14.6%, and lasting weakness on one side in 16.9%.
What this means, and what it doesn't
What it could mean: If you need awake surgery, the dye may help your surgeon see the tumor better. Surgeons still used brain mapping: Finding out which parts of your brain do which jobs, like speech or movement. A scan before an operation can do it. It can also be done during one. Then small spots are tested with a tiny electric current. See the glossary to decide where to stop cutting. In some cases they stopped even though tissue was still glowing. Mapping, not the dye, set the limit of the surgery.
What it doesn't mean: This is not a new treatment, and it is not a cure. It is a review of studies that were already done, not a new trial. No group had awake surgery without the dye. So we cannot say yet that the dye is safer or better. The studies were small, and the numbers may change as more work is done.
Source: PubMed, October 17, 2026 · Read the original
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