Fine structure of psammoma bodies at the outer aspect of blood vessels in meningioma.

Abstract:

:Psammoma bodies at the perivascular area in five cases of meningioma were examined with the electron microscope. In general, meningocytic cells invest the outer aspect of blood vessels, which are constituted by multilayered basal laminae, collagen fibers, microfibrils, and pericytes. Remnants of degenerated cells are observed in some areas of the perivascular space. Matrix vesicles and matrix giant bodies with or without mineralized deposits are also present in those areas. Energy dispersive, X-ray microanalysis evidenced the presence of both calcium and phosphorus (probably hydroxyapatite) mineralized precipitates. Production of psammoma bodies in the perivascular area may indicate that matrix vesicles and matrix giant bodies are derived from degenerated cells, which then sequestrate hydroxyapatite crystals to form psammoma bodies.

journal_name

Acta Neuropathol

journal_title

Acta neuropathologica

authors

Kubota T,Hirano A,Sato K,Yamamoto S

doi

10.1007/BF00688693

subject

Has Abstract

pub_date

1985-01-01 00:00:00

pages

163-6

issue

2

eissn

0001-6322

issn

1432-0533

journal_volume

66

pub_type

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