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Start free with EleplanSubependymal giant cell astrocytoma
ORPHA:251618Disease
Also called SEGA
What it is
A rare astrocytoma characterized by a benign, slowly growing lesion that typically arises in the walls of the lateral ventricles, and most commonly occurs in patients < 20 years with tuberous sclerosis complex. Most patients present with worsening epilepsy or symptoms of increased intracranial pressure. This WHO grade 1 tumor is composed of astrocytes with various phenotypes (i.e. polygonal, gemistocytic, spindle, and ganglionic-like). On immunohistochemistry, it is usually positive for GFAP, S100, beta-tubulin, neurofilament, synaptophysin, NeuN, TTF1, and phosphorylated S6 but shows weak or negative staining for tuberin, hamartin, and Ki-67. It has its specific DNA methylation profile.
Key facts
- Classified as
- Disease
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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