<prompt> Rosenthal fibres are seen in -Pilocytic astrocytomaGlioblastomaMedulloblastomaEpendymoma  <response>: Rosenthal fibers are thick, elongated, corkscrew eosinophilic bundles that are found on HE staining of the brain.They are seen in the presence of long-standing gliosis, pilocytic astrocytoma, Alexanders disease a rare leukodystrophy and fucosidosis. 