Schwannoma arising from the tentorium at an unusual location: Case report

Akihiro Oikawa, Naoto Takeda, Nobuhiko Aoki, Touichiro Takizawa, Takaaki Sakoma, Griffith R. Harsh IV, Jack P. Rock, Robert E. Breeze

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

OBJECTIVE AND IMPORTANCE: We present a case of schwannoma attached to the tentorium. CLINICAL PRESENTATION: A 41-year-old woman without evidence of neurofibromatosis presented with a 3-month history of headache, positional vertigo, and truncal ataxia. Magnetic resonance imaging revealed an extra-axial cystic mass lesion in the left anteromedial cerebellar region with a dural tail sign. INTERVENTION: The tumor was removed completely by retrosigmoid craniotomy. Dense adhesion of the tumor to the inferior surface of the tentorium was confirmed during surgery. On light microscopic study, this neoplasm was composed of spindle cells and showed palisaded structures. Immunohistochemically, the tumor cells stained positive for S-100 protein and vimentin. Reticulin staining revealed a pericellular pattern of distribution of reticulin fibers. Electron microscopy confirmed the presence of a basement membrane encompassing the tumor cells. From these findings, the tumor was diagnosed as a schwannoma arising from the tentorium. CONCLUSION: To our knowledge, this case report is the first to describe a schwannoma arising from the tentorium. Our case report indicates that schwannoma is a possible pathology in the differential diagnosis of durabased tumors.

Original languageEnglish (US)
Pages (from-to)1352-1355
Number of pages4
JournalNeurosurgery
Volume50
Issue number6
DOIs
StatePublished - Jun 1 2002
Externally publishedYes

Keywords

  • Dura
  • Falx
  • Schwannoma
  • Tentorium

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology

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