Fibrous meningeal tumours with extensive non-calcifying collagenous whorls and glial fibrillary acidic protein expression: the whorling-sclerosing variant of meningioma

Neuropathol Appl Neurobiol. 2002 Feb;28(1):42-7. doi: 10.1046/j.0305-1846.2001.00364.x.

Abstract

Meningiomas comprise a wide range of morphological patterns. We describe unusual fibrous meningeal tumours in two patients, composed of extensive non-calcifying collagenous whorls of varying size, resembling non-calcified psammoma bodies, while interposed tumour cells are sparse. Immunohistochemistry showed expression of S-100, vimentin and glial fibrillary acidic protein, whereas only single tumour cells stained for epithelial membrane antigen. Electron microscopy detected desmosomes or desmosome-like structures in both specimens. We conclude that these tumours represent a peculiar whorling-sclerosing variant of fibrous meningioma. Recognition of this meningioma variant is important in the differential diagnosis of meningioma versus other fibrous tumours of the meninges, including solitary fibrous tumours of the meninges, unusual forms of desmoplastic gliomas or chondroid tumours.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Collagen / analysis
  • Diagnosis, Differential
  • Female
  • Glial Fibrillary Acidic Protein / analysis
  • Humans
  • Magnetic Resonance Imaging
  • Male
  • Meningeal Neoplasms / chemistry
  • Meningeal Neoplasms / pathology*
  • Meningioma / chemistry
  • Meningioma / pathology*
  • Microscopy, Electron
  • Middle Aged

Substances

  • Glial Fibrillary Acidic Protein
  • Collagen