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Fibrous meningeal tumours with extensive non‐calcifying collagenous whorls and glial fibrillary acidic protein expression: the whorling‐sclerosing variant of meningioma
Author(s) -
Haberler C.,
Jarius C.,
Lang S.,
Rössler K.,
Gruber A.,
Hainfellner J. A.,
Budka H.
Publication year - 2002
Publication title -
neuropathology and applied neurobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.538
H-Index - 95
eISSN - 1365-2990
pISSN - 0305-1846
DOI - 10.1046/j.0305-1846.2001.00364.x
Subject(s) - pathology , glial fibrillary acidic protein , meningioma , meninges , immunohistochemistry , vimentin , psammoma body , biology , anatomy , medicine
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.