Pacchionic Granulation
The Pacchionian granulations are small button-like (avascular) Aussackungen the arachnoid membrane (Arachnoidea) through the outermost meninges (Dura mater) into the venous sinuses . They are used to absorb the cerebral fluid (liquor) .
Synonyms are: arachnoid villi; Arachnoid granulations; Latin Granulationes arachnoideales; Foveolae granulares
The name refers to the first description by Antonio Pacchioni in 1705.
These granulations are predominantly found in the frontal area of the drainage area of the superior sagittal sinus ; if they are of the appropriate size, they can form bony thinning zones , the foveolae granulares . They arise from the age of 12.
They are found in at least 2 out of 3 people on magnetic resonance imaging .
These granulations are important in medical imaging for differentiating from sinus thrombosis , but also from possible extradural masses.
Pacchionic granulations can also be detected in birds .
literature
- H. Park, GY Lim, TH Eom: Giant arachnoid granulation in a child with benign intracranial hypertension: an unusual case. In: Child's nervous system: ChNS: official journal of the International Society for Pediatric Neurosurgery. Volume 34, Number 12, December 2018, pp. 2525-2527, doi: 10.1007 / s00381-018-3898-3 , PMID 30019113 .
- E. Ayaz, B. Atalay, B. Baysal, S. Senturk, A. Aslan: Giant arachnoid granulation mimicking dural sinus thrombosis. In: Northern clinics of Istanbul. Volume 4, number 2, 2017, pp. 185–187, doi: 10.14744 / nci.2017.93063 , PMID 28971178 , PMC 5613268 (free full text).
Individual evidence
- ↑ a b Entry on Granulationes arachnoideales in Flexikon , a Wiki of the DocCheck company
- ^ Willibald Pschyrembel : Clinical Dictionary , 266th, updated edition, de Gruyter, Berlin 2014, ISBN 978-3-11-033997-0
- ↑ Who named it
- ↑ Dissertatio epistolaris de glandulis conglobatis durae Meningis humanae, indeque ortis lymphaticis ad piam Meningem productis. Rome 1705
- ↑ W. Schuster, D. Färber (editor): Children's radiology. Imaging diagnostics. Vol. 1, p. 391, Springer 1996, ISBN 3-540-60224-0 .
- ↑ a b Radiopaedia
- ↑ Differential diagnosis of sinus vein thrombosis
- ↑ Hannes Rabe, Inaugural Dissertation 2003