arachnoid granulations


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Related to arachnoid granulations: arachnoid trabeculae

a·rach·noid gran·u·la·tions

[TA]
tufted prolongations of pia-arachnoid, composed of numerous arachnoid villi that penetrate dural venous sinuses and effect transfer of cerebrospinal fluid to the venous system. In older people, these are more numerous and tend to calcify.

arachnoid granulations

Small fibrovascular nodules located on the superior sagittal sinus and adjacent venous lacunae, which are responsible for reabsorbing cerebrospinal fluid.

a·rach·noid gran·u·lat·ions

(ă-rak'noyd gran-yū-lā'shŭnz) [TA]
Tufted prolongations of pia-arachnoid, composed of numerous arachnoid villi that penetrate the dural venous sinuses and effect transfer of cerebrospinal fluid to the venous system.
Synonym(s): granulationes arachnoideales [TA] , pacchionian bodies.

Pacchioni,

Antonio, Italian anatomist, 1665-1726.
pacchionian bodies - tufted prolongations of pia-arachnoid. Synonym(s): arachnoid granulations; pacchionian corpuscles; pacchionian glands; pacchionian granulations
pacchionian corpuscles - Synonym(s): pacchionian bodies
pacchionian depressions - pits on the inner surface of the skull in which are lodged the arachnoidal granulations. Synonym(s): granular pits
pacchionian glands - Synonym(s): pacchionian bodies
pacchionian granulations - Synonym(s): pacchionian bodies
References in periodicals archive ?
Battal and Castillo [4] concluded that herniations of brain parenchyma into arachnoid granulations can occur spontaneously or as a result of increased intracranial pressure.
Balko, "Normal appearance of arachnoid granulations on contrast-enhanced CT and MR of the brain: differentiation from dural sinus disease," American Journal of Neuroradiology, vol.
Potts, "Arachnoid granulations: radiology and anatomy," Radiology, vol.
Tomsick, "Large arachnoid granulations involving the dorsal superior sagittal sinus: findings on MR imaging and MR venography," American Journal of Neuroradiology, vol.
Wilms, "Giant arachnoid granulations mimicking pathology: a report of three cases," Neuroradiology Journal, vol.
San Millan, "Brain herniations into arachnoid granulations: about 68 cases in 38 patients and review of the literature," Neuroradiology, vol.
These findings were found to be compatible with a brain herniation into a giant arachnoid granulation, with strangulation and infarction of the herniated brain tissue.
[14] described a focal brain herniation into a giant arachnoid granulation located in a DVS which may have developed spontaneously or was induced by elevated intracranial pressure and cerebral edema resulting from prior head trauma.
Our case demonstrated such unusual complication of brain herniation into a giant arachnoid granulation, in a rare and unique location: the convexity area (left parasagittal parietal region).
In conclusion, we have presented a rare and unique case of brain herniation in the convexity area into a giant arachnoid granulation, without any history of trauma or of elevated intracranial pressure.
Couldwell, "Incidental giant arachnoid granulation," American Journal of Neuroradiology, vol.