A brain tumor that looked like a glioma turned out to be a spread from another cancer
Original title: Solitary left frontotemporal neuroendocrine metastasis mimicking a high-grade astrocytoma.
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, not a treatment that was tested.
The short version
Extra lab tests on the tumor tissue changed the diagnosis for one young man, and that changed his care.
What was studied. This is a report about one patient. He was a 22 year old man with a brain lesion on the left side, and doctors looked at what it really was.
What they found. His first sign was a seizure with a bad headache, weakness, and numbness and drooping on the right side of his face, which later spread to his right arm. An MRI made the lesion look like a fast growing 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, a tumor that starts in the brain. Surgeons removed the whole lesion. The first tissue exam also pointed to a fast growing glioma. But extra lab staining on the tumor tissue showed it was a carcinoma with neuroendocrine features, meaning it had spread to the brain from somewhere else. A scan done after surgery did not find where that cancer started.
What this means, and what it doesn't
What it could mean: Brain tumors that spread from other parts of the body can look just like a tumor that started in the brain, even on scans and on a first tissue exam. Extra lab tests on the removed tissue can catch this. Getting the label right matters, because a cancer that spread from elsewhere needs a search of the rest of the body and a different treatment plan.
What it doesn't mean: This is not a cure, and it is not a new treatment. It is a report about a single patient, not a study that compared treatments or tested a drug. One case cannot tell you how common this is or what will happen to anyone else. It also does not mean scans or first tissue results are usually wrong. If you have questions about your own diagnosis, talk with your care team.
Source: PubMed, July 17, 2026 · Read the original
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