C11orf95-RELA, YAP1-MAMLD1, and YAP1-FAM118B Fusion Negative Anaplastic Ependymoma with Lipogenic Differentiation

Lipogenic differentiation in ependymoma is an infrequent occurrence with very few reported cases. The grading was done solely based on the histomorphology and molecular subtyping was not described in such ependymomas. New molecular classification divided ependymomas in nine different subgroups, of w...

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Published in:Neurology India 2023-09, Vol.71 (5), p.1011-1014
Main Authors: Jha, Shilpy, Mulgulwar, Prit, Sharma, Mehar, Purkait, Suvendu, Pattnaik, Ashis, Sable, Mukund
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Brain cancer
Brain tumors
Case studies
Diagnosis
Genetic aspects
Gliomas
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Pattnaik, Ashis
Sable, Mukund
description Lipogenic differentiation in ependymoma is an infrequent occurrence with very few reported cases. The grading was done solely based on the histomorphology and molecular subtyping was not described in such ependymomas. New molecular classification divided ependymomas in nine different subgroups, of which supratentorial location tumor usually exhibits C11orf95-RELA, YAP1-MAMLD1, and YAP1-FAM118B fusion proteins. A 46-year-old female presented with headache and right-sided parapresis. Radilogy revealed a large intraxial left parietooccipital mass lesion, which histologically and immuohistochemically confirmed as anaplastic ependymoma with extensive lipogenic changes. The ependymal origin of the tumor was corroborated by the immunohistochemistry and ultrastructural studies. Molecular studies for C11orf95-RELA, YAP1-MAMLD1, and YAP1-FAM118B fusion proteins were negative. This is the first documentation of fusion negative supratentorial anaplastic ependymoma with lipogenic differentiation. This novel finding needs further reinforcement by similar studies to identify its impact on the disease outcome.
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subjects Brain cancer
Brain tumors
Case studies
Diagnosis
Genetic aspects
Gliomas
title C11orf95-RELA, YAP1-MAMLD1, and YAP1-FAM118B Fusion Negative Anaplastic Ependymoma with Lipogenic Differentiation
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