Rosette-forming glioneuronal tumor: Report of a chiasmal-optic nerve example in neurofibromatosis type 1: Special pathology report

Bernd W. Scheithauer, Ana I. Silva, Rhett P. Ketterling, J. H. Pula, James F. Lininger, Mark J. Krinock

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

OBJECTIVE: Rosette-forming glioneuronal tumor is a rare, rather recently described tumor featuring a highly distinctive, biphasic histological pattern, including a cytologically uniform neuronal component of Homer-Wright type pseudorosettes and an accompanying astrocytic element resembling pilocytic astrocytoma. Its occurrence in the posterior fossa and association with the fourth ventricle is stereotypical and a feature of all reported cases. CLINICAL PRESENTATION: In this article, we describe the first rosette-forming glioneuronal tumor arising outside this site, a histologically classic example involving the anterior visual pathway and associated with neurofibromatosis type 1. INTERVENTION: Genetic (fluorescent in situ hybridization) studies demonstrated no large deletion in either normal or neoplastic tissue, indicating that the genetic abnormality underlying neurofibromatosis type 1 in this patient is likely a very small deletion or point mutation. CONCLUSION: The relation of the tumor to the underlying neurofibromatosis type 1 cannot be assessed.

Original languageEnglish (US)
Pages (from-to)E771-E772
JournalNeurosurgery
Volume64
Issue number4
DOIs
StatePublished - Apr 1 2009

Keywords

  • Chiasm
  • Neurofibromatosis type 1
  • Optic nerve
  • Rosette- forming glioneuronal tumor

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology

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