open access

Ahead of Print
Original article
Published online: 2020-11-24
Submitted: 2019-06-27
Accepted: 2019-08-22
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Parietal foramen: incidence and topography

J. Naidoo, J. S. Luckrajh, L. Lazarus
DOI: 10.5603/FM.a2020.0140
·
Pubmed: 33241848

open access

Ahead of Print
ORIGINAL ARTICLES
Published online: 2020-11-24
Submitted: 2019-06-27
Accepted: 2019-08-22

Abstract

The parietal foramen (PF) is a small inconsistent aperture located at the border of the middle 1/3 and posterior 1/3 of the parietal bone near the sagittal suture and is considered an emissary foramen. Cranial emissary foramina are of utmost importance due to the structures that traverse the foramen. Variations in these foramina are common. Knowledge of the PF is important when performing neurosurgical procedures as the emissary vessels are at risk. The present study used 100 dry adult calvaria to determine the frequency of PF, the diameter of the PF, as well as topography of the PF (using the sagittal suture as an anatomical landmark). A total of 32% of calvaria had PF present bilaterally; whilst 35% of calvaria had unilateral PF. The study also reports 5% calvaria in which PF were present on the sagittal suture. The mean diameter recorded was 1.55mm [0.74 - 3.08mm], and the mean distance between the lateral margin of the PF and the sagittal suture was 9.02mm [4.44 - 18.20mm]. Knowledge of the incidence and topography of the PF may aid neurosurgeons in creating and adjusting techniques and procedures in order to mitigate the risk of injury to emissary veins and other structures emerging from the PF.

Abstract

The parietal foramen (PF) is a small inconsistent aperture located at the border of the middle 1/3 and posterior 1/3 of the parietal bone near the sagittal suture and is considered an emissary foramen. Cranial emissary foramina are of utmost importance due to the structures that traverse the foramen. Variations in these foramina are common. Knowledge of the PF is important when performing neurosurgical procedures as the emissary vessels are at risk. The present study used 100 dry adult calvaria to determine the frequency of PF, the diameter of the PF, as well as topography of the PF (using the sagittal suture as an anatomical landmark). A total of 32% of calvaria had PF present bilaterally; whilst 35% of calvaria had unilateral PF. The study also reports 5% calvaria in which PF were present on the sagittal suture. The mean diameter recorded was 1.55mm [0.74 - 3.08mm], and the mean distance between the lateral margin of the PF and the sagittal suture was 9.02mm [4.44 - 18.20mm]. Knowledge of the incidence and topography of the PF may aid neurosurgeons in creating and adjusting techniques and procedures in order to mitigate the risk of injury to emissary veins and other structures emerging from the PF.

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Keywords

parietal foramen, emissary foramen, osteology, incidence, topography, diameter, sagittal suture

About this article
Title

Parietal foramen: incidence and topography

Journal

Folia Morphologica

Issue

Ahead of Print

Article type

Original article

Published online

2020-11-24

DOI

10.5603/FM.a2020.0140

Pubmed

33241848

Keywords

parietal foramen
emissary foramen
osteology
incidence
topography
diameter
sagittal suture

Authors

J. Naidoo
J. S. Luckrajh
L. Lazarus

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