Osseous bridging of the condylar fossa: report of a rare anatomical variation at the outer skull base.

IF 1.4 4区医学 Q2 Medicine

Surgical and Radiologic Anatomy Pub Date : 2024-08-01 Epub Date: 2024-06-26 DOI:10.1007/s00276-024-03422-w

Michael Wolf-Vollenbröker, Andreas Prescher

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Abstract

Purpose: The topic of osseous variations of the craniocervical junction is a complex morphological and embryological chapter of human anatomy, with a possible impact on neurogical and vascular functionality in this morphological variable region.

Material & methods: An until now undescribed anatomical variation of the exoccipital part of the occipital bone has been observed after maceration at the outer skull base of a West-European 68-year-old male body donor.

Results: On both sites of the foramen magnum accessory osseous processes were observed that arise from the jugular process and point towards the lateral margin of the foramen magnum. On the left site this process forms a full arc that bridges the condylar fossa completely.

Conclusion: The observed osseous bridge over the condylar fossa has not been reported on before and can be explained by the partial persistence of a primordial vertebra between atlas and occipital bone: the Proatlas. The resulting accessory structure may affect due to its topographic conditions the V3-Segment of the vertebral artery and its accompanying nerves, and thus, play a role in diagnosis and therapy of vascular and/or neurological symptoms of head and neck.

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髁状窝骨桥：外颅底罕见的解剖变异报告。

目的：颅颈交界处的骨性变异是人体解剖学中一个复杂的形态学和胚胎学章节，可能对这一形态多变区域的神经和血管功能产生影响：在对一名西欧籍 68 岁男性遗体捐献者的外颅底进行浸渍后，观察到枕骨外枕骨部分出现了迄今为止尚未描述过的解剖变异：结果：在枕骨大孔的两个部位都观察到了附属骨突，这些附属骨突来自颈突，指向枕骨大孔的外侧缘。在左侧部位，该突起形成一个完整的弧形，完全桥接髁状窝：结论：在髁状窝上观察到的骨桥以前从未报道过，其原因是在寰椎和枕骨之间存在部分原始椎骨：Proatlas。由此产生的附属结构可能因其地形条件而影响椎动脉 V3 段及其伴行神经，从而在头颈部血管和/或神经症状的诊断和治疗中发挥作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Surgical and Radiologic Anatomy Medicine-Pathology and Forensic Medicine

CiteScore

2.40

自引率

14.30%

发文量

期刊介绍： Anatomy is a morphological science which cannot fail to interest the clinician. The practical application of anatomical research to clinical problems necessitates special adaptation and selectivity in choosing from numerous international works. Although there is a tendency to believe that meaningful advances in anatomy are unlikely, constant revision is necessary. Surgical and Radiologic Anatomy, the first international journal of Clinical anatomy has been created in this spirit. Its goal is to serve clinicians, regardless of speciality-physicians, surgeons, radiologists or other specialists-as an indispensable aid with which they can improve their knowledge of anatomy. Each issue includes: Original papers, review articles, articles on the anatomical bases of medical, surgical and radiological techniques, articles of normal radiologic anatomy, brief reviews of anatomical publications of clinical interest. Particular attention is given to high quality illustrations, which are indispensable for a better understanding of anatomical problems. Surgical and Radiologic Anatomy is a journal written by anatomists for clinicians with a special interest in anatomy.