loading...| Preferred Name |
Ependymoblastoma |
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| Synonyms |
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| Definitions |
Ependymoblastoma is a rare tumor that occurs in infants and young children in the first two years of life. Both sexes are affected equally. Patients present with signs and symptoms of raised intracranial pressure and hydrocephalus. Focal neurological signs may be present in older children. On MRI, ependymoblastomas are large heterogeneously enhancing lesion with associated brain edema and mass effect. Ependymoblastomas are well-circumscribed lesions, with a distinct margin between tumor and normal brain, though focal microscopic extension and leptomeningeal invasion are common. Histologically, an ependymoblastoma is a primitive neuroectodermal tumor with tumor cell arranged in multilayered rosettes consisting of an outer rim of tumor cells merging with the surrounding undifferentiated neuroectodermal cells. The tumor cells are immunopositive for S100, vimentin, cytokeratin and GFAP, and show high mitotic activity. A highly malignant embryonal tumor of infancy and young childhood characterized by neuroectodermal elements organized in distinctive multilayered rosettes. Ependymoblastomas are large lesions that occur in the supratentorial compartment, typically displaying a physical connection to the ventricular system. |
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| ID |
http://purl.obolibrary.org/obo/HP_0030066 |
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| comment |
Ependymoblastoma is a rare tumor that occurs in infants and young children in the first two years of life. Both sexes are affected equally. Patients present with signs and symptoms of raised intracranial pressure and hydrocephalus. Focal neurological signs may be present in older children. On MRI, ependymoblastomas are large heterogeneously enhancing lesion with associated brain edema and mass effect. Ependymoblastomas are well-circumscribed lesions, with a distinct margin between tumor and normal brain, though focal microscopic extension and leptomeningeal invasion are common. Histologically, an ependymoblastoma is a primitive neuroectodermal tumor with tumor cell arranged in multilayered rosettes consisting of an outer rim of tumor cells merging with the surrounding undifferentiated neuroectodermal cells. The tumor cells are immunopositive for S100, vimentin, cytokeratin and GFAP, and show high mitotic activity. |
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| database_cross_reference |
UMLS:C0700367 SNOMEDCT_US:21589007 MSH:D018242 SNOMEDCT_US:715901002 |
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| definition |
A highly malignant embryonal tumor of infancy and young childhood characterized by neuroectodermal elements organized in distinctive multilayered rosettes. Ependymoblastomas are large lesions that occur in the supratentorial compartment, typically displaying a physical connection to the ventricular system. |
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| has_obo_namespace |
human_phenotype |
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| id |
HP:0030066 |
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| label |
Ependymoblastoma |
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| notation |
HP:0030066 |
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| prefLabel |
Ependymoblastoma |
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| subClassOf |