The Occurrence of Wormian Bones Within the Cranial Sutures and Their Clinical Significance

T.M, Veeresh Kumar; Kumar, Vivek; Yadav, Nisha

doi:10.16965/ijar.2016.408

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…Such variation affects lambda more than the inion, as the lambda is at the peak of the occipital bone, in uenced by the whole bone height, whilst the inion is in the occipital bone's middle third. Additionally, the occasional presence of Wormian bones inside lambda can decrease this points accuracy to nd the PF 21 .…”

Section: Discussionmentioning

confidence: 99%

Parietal Foramen as A Landmark to Locate Intracranial Vascular and Parenchymal Structures

Brainer-Lima¹,

Brainer-Lima²,

Ferreira³

et al. 2020

Preprint

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The aim of this study was to define the location of the parietal foramina (PF) with reference to skull landmarks and correlate the PF with cerebral and vascular structures to optimize neurosurgical procedures in the intracranial compartment. Two hundred and thirty-eight parietal bones studied by magnetic resonance imaging (MRI) of 119 patients were reviewed. The cephalometric points, inion, bregma, sagittal suture and lambda were used as anatomical references to locate the PF and define its anatomical relationships to parenchymal cerebral structures, especially some eloquent areas. The PF was identified in the MRI in 83 of the 119 individuals (69.7%) and was located at an average distance of 9.5 ± 0.8 cm (mean ± SD) posteriorly and 0.9 ± 0.3cm laterally to the Bregma. In over 90% of cases, the PF was located within a 2 cm radius of the bregma-PF distance’s mean value. Surgeons operating in the parietal region should be aware of the frequency of PF (69.7%), its location (superolateral to lambda) and its stable relationship with underlying anatomical structures. 88% of the 62 left PF’s were situated within 1cm, laterally to the left margin of the superior sagittal sinus (SSS). 60% of the right PF were situated within 1.3 cm laterally from the right margin of the SSS, while 40% were directly above the SSS. We propose that the PF should be used as the reference for the superior sagittal sinus during its course through the parietal lobe, as its constancy overtakes other commonly used landmarks (sagittal suture and midline). In conclusion, clinicians should be aware of the PF to both avoid iatrogenic injury to an emissary vein that courses through it that can lead to air embolism and as a guide to maneuvering through the parietal region.

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Section: Discussionmentioning

confidence: 99%

Parietal Foramen as A Landmark to Locate Intracranial Vascular and Parenchymal Structures

Brainer-Lima¹,

Brainer-Lima²,

Ferreira³

et al. 2020

Preprint

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“…These bones are found in close proximity to the lambdoid suture or the fontanelles. 2 Their presence arises due to additional ossification centers close to the previously mentioned sutures. The occurrence of these additional bones can lead to misconceptions when interpreting X-rays analysis of the skull, falsely assuming the occurrence of fractures.…”

Section: Introductionmentioning

confidence: 98%

Influence of ossification centers on the appearance of wormian bones and sutures

Maslarski¹,

Yaneva²,

Ingilizov³

2019

MOJAP

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The skull is formed of different types of bones composed of two plates of compact bone tissue and a hollow region of spongy bone containing the "diploe". The connections between the bones are made by different kinds of sutures. The presence of additional bones, called wormian bones (WB) and sutures is a common phenomenon. The aim of the current research is to follow up ossification centers and the origin of accessory structures like sutures and bones. Their genesis and the influence of the environmental factors would also be discussed. A few findings that have additional wormian bones and sutures in the occipital fontanelle region have been described in this case.The variations of the skull bones and connections have the following significance: in newborns they might play an important role for the normal development of the CNS. It is known that dura mater and the calvaria release dissolved heparin connecting factor which is important for the suture's firmness. The variations described could be useful for the neurosurgery and traumatology practice.

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Prevalence of wormian bones in dried adult human skulls: an osteo-morphometric study in Nepal

2018

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The purpose of this study was to determine the incidence of wormian bones (WBs) in different head shapes of Nepalese skulls along with their distribution at various sites. This study was conducted on 70 Nepalese skulls obtained from the Department of Anatomy, Nepal Medical College, and the Institute of Medicine from September 2017 to January 2018. The skulls were examined for the presence and topographic distribution of WBs. The occurrence of WBs at various sites was correlated among different head shapes. The incidence of skulls showing WBs was 88.57%. The WBs were observed at the lambdoid (61.43%), parietomastoid (41.43%), occipitomastoid (27.14%), pterion (25.71%), asterion (24.29%), lambda (11.43%), sagittal (7.14%) and coronal sutures (4.28%). The dominant head type was dolichocephalic (44.29%) and the least dominant was brachycephalic (10%). The maximum number of WBs was shown on brachycephalic (mean 8.86 ± 7.13) then hyperdolichocephalic (mean 8.33 ± 9.15), mesaticephalic (mean 5.10 ± 4.45) and dolichocephalic heads (mean 4.16 ± 5.30). Brachycephalic heads frequently exhibited WBs at the pterion (57.14%) and at different sutures: lambdoid (71.42%), parietomastoid (57.14%), sagittal (28.57%) and squamous (14.28%). Hyperdolichocephalic heads displayed more lambda (33.33%) and coronal (8.33%) WBs. Similarly, dolichocephalic and mesaticephalic heads showed WBs at the occipitomastoid (35.48%) and asterion (30%), respectively. Inca bones were only identified in three dolichocephalic skulls. Neurosurgeons, radiologists and orthopedists should be careful when doing clinical and surgical procedures on different head shapes of the Nepalese population.

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The Occurrence of Wormian Bones Within the Cranial Sutures and Their Clinical Significance

Cited by 4 publications

References 3 publications

Parietal Foramen as A Landmark to Locate Intracranial Vascular and Parenchymal Structures

Parietal Foramen as A Landmark to Locate Intracranial Vascular and Parenchymal Structures

Influence of ossification centers on the appearance of wormian bones and sutures

Prevalence of wormian bones in dried adult human skulls: an osteo-morphometric study in Nepal

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