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Start free with EleplanEmbryonal tumor with multilayered rosettes
ORPHA:656417Disease
Also called ETMR
What it is
A rare central nervous system embryonal tumor characterized by embryonal cells arranged in multilayered rosettes and displaying one of three morphological patterns: embryonal tumor with abundant neuropil and true rosettes, ependymoblastoma, or medulloepithelioma. The tumors typically have a C19MC alteration or (rarely) a DICER1 mutation and correspond to WHO grade IV. They are mostly localized intracranially, rarely in the spinal cord, and commonly cause signs and symptoms of elevated intracranial pressure, sometimes seizures and focal neurological signs. Most cases occur in children during the first two years of life.
Key facts
- Inheritance
- Multigenic/multifactorial
- Classified as
- Disease
Recorded for the broader condition
- Prevalence
- <1 / 1 000 000 (annual incidence, Europe)Central nervous system embryonal tumor
- Age of onset
- ChildhoodCentral nervous system embryonal tumor
Orphanet records these for the broader condition rather than for this specific form. They are a starting point, not a figure for this subtype — subtypes often differ, and some are defined by being rarer than the condition they sit under.
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.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
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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