A rare brain tumor found in a young man with a rare growth condition
Original title: Diffuse hemispheric glioma, H3 G34-mutant, in Simpson-Golabi-Behmel syndrome: the first reported case.
How far along is this research?
- Lab cells
- Animals
- Review
- Tested in people
This was tested in people. That is the most reliable kind of research we share.
This is a report about one patient that points doctors in a direction. It is not a treatment.
The short version
Doctors report one young man who had both a rare inherited growth condition and a serious brain tumor, a pairing never written up before.
What was studied. This is a report about one patient. He was an 18-year-old man who had been told in childhood that he had Sotos syndrome. Doctors looked at his tumor and tested his blood for gene changes.
What they found. He suddenly became less alert. Scans showed a large tumor in the back left side of his brain, and it was removed with surgery. Tests on the tumor showed a diffuse hemispheric glioma: A tumor that starts in the glial cells, the support cells of the brain and spinal cord. Gliomas are graded 1 to 4 by how fast they tend to grow. See the glossary, H3 G34-mutant, which is a grade 4 brain tumor. Blood testing found a missing piece of a gene called GPC3, covering exons 3-5. That changed his diagnosis to Simpson-Golabi-Behmel syndrome, and the authors say this is the first reported case of this syndrome with a glioma.
What this means, and what it doesn't
What it could mean: For most patients, this changes nothing about treatment today. It is a signal to doctors that people with this rare growth syndrome might, very rarely, develop this kind of brain tumor. It also raises a question about whether GPC3 gene changes play some part in how these tumors start.
What it doesn't mean: This does not mean a new treatment exists. It is a report about a single patient, which is the earliest and weakest kind of evidence. It does not prove that the gene change caused the tumor. It is not a cure, and it is not something you can ask your doctor for. Much more research in many more people would be needed before this changes any care.
Source: PubMed, July 28, 2026 · Read the original
This plain-language summary was written by AI and published automatically after passing our automatic safety checks. How we write.