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Rosetted glioneuronal tumor: a case with proliferating neuronal nodules
K Keyvani1, C H Rickert, K von Wild
1Institute of Neuropathology, Westfälische Wilhelms-Universität Münster, Germany. keyvani@uni-muenster.de
Acta Neuropathologica
|August 4, 2001
Summary
This study details a rare glioneuronal tumor case, highlighting its unique histological and genetic profile. The findings contribute to understanding these novel brain tumors and their associated epilepsy.
Area of Science:
- Neuro-oncology
- Brain Tumor Research
- Epilepsy Genetics
Background:
- Glioneuronal tumors with neuropil-like islands (rosetted glioneuronal tumors) represent a recently identified brain tumor classification.
- These tumors exhibit distinct clinicopathological characteristics.
Observation:
- A case study of a 43-year-old male with focal motor epilepsy presented with a parietal lobe tumor.
- Histological examination revealed neuronal tumor cell nodules (immunoreactive for synaptophysin and NeuN) within a diffuse astrocytoma.
- The highest proliferative activity was noted within the neuronal nodules.
Findings:
- Comparative genomic hybridization identified a gain on chromosome 7q and a loss on chromosome 9p.
- The tumor displayed a mixed glial and neuronal component with distinct histological features.
Implications:
- This case expands the known spectrum of glioneuronal tumors.
- Understanding the genetic alterations (7q gain, 9p loss) may offer insights into tumor development and progression.
- Further research is needed to elucidate the specific role of these genetic changes in tumor behavior and epilepsy association.