arachnoid granulation


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arachnoid granulation

Folds of the arachnoid layer of the cranial meninges that project through the inner layer of dura mater into the superior sagittal sinus and other venous sinuses of the brain. Through them, cerebrospinal fluid re-enters the bloodstream.
Synonym: arachnoid villus; pacchionian body
See also: granulation
References in periodicals archive ?
Evaluation and management of temporal bone arachnoid granulations.
Arachnoid granulations in the transverse and sigmoid sinuses CT, MR, and MR angiographic appearance of a normal anatomic variation.
These changes were sufficient to inhibit the function of the arachnoid granulations, diminishing CSF resorption with a resulting communicating hydrocephalus.