Morphology and origin of arachnoid cysts. Scanning and transmission electron microscopy of three cases

Three surgically removed primary arachnoidal cysts were studied with scanning electron microscopy (SEM) and two of the cases with transmission electron microscopy (TEM). The cells lining the cyst cavity had microvilli at the surface, true cilia were absent. In the cytoplasm multivesicular bodies, ma...

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Bibliographic Details
Published in:Acta neuropathologica 1978-10, Vol.44 (1), p.57-62
Main Authors: Go, K G, Houthoff, H J, Blaauw, E H, Stokroos, I, Blaauw, G
Format: Article
Language:English
Subjects:
Adult
Arachnoid
Child
Cysts - pathology
Female
Humans
Infant
Intercellular Junctions - ultrastructure
Male
Microscopy, Electron
Microscopy, Electron, Scanning
Microvilli - ultrastructure
Middle Aged
Pinocytosis
Vacuoles - ultrastructure
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Summary:Three surgically removed primary arachnoidal cysts were studied with scanning electron microscopy (SEM) and two of the cases with transmission electron microscopy (TEM). The cells lining the cyst cavity had microvilli at the surface, true cilia were absent. In the cytoplasm multivesicular bodies, many pinocytotic vesicles, some large vacuoles and strands of tonofilaments were prominent features. The cells were interconnected by desmosome-like junctions and were separated from the surrounding tissue by a distinct but sometimes incomplete basal membrane. Based on these findings it is concluded that arachnoid cysts are derived from the outer arachnoid cells (subdural neurothelium), the formation of the cysts being attributabel to secretory capacity of the subdural neurothelium.
ISSN:0001-6322
1432-0533
DOI:10.1007/BF00691640