Mastoid pouch of the sigmoid sinus- an extraordinary anatomical variant.

IF 1.4 4区医学 Q2 Medicine

Surgical and Radiologic Anatomy Pub Date : 2025-02-18 DOI:10.1007/s00276-025-03590-3

Mugurel Constantin Rusu, Corneliu Toader, Răzvan Costin Tudose

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Abstract

Purpose: The dural sigmoid sinus (SS) is a major surgical landmark. It is aimed to report an extraordinary and clinically significant anatomical variation- the mastoid pouch of the SS, which replaces the mastoid air cells.

Method: The archived angioCT file of a 45 y.o. male was retrospectively studied on planar sections and by three-dimensional volume renderings.

Results: An expansive mastoid pouch of the left SS was found, measuring 1.74 cm in transverse diameter and 2.18 cm in sagittal diameter, replacing the typical mastoid air cell system. This SS pouch extended to the mastoid cortex and was covered by a robust (1.41 cm broad) tegmen sinus sigmoidei. The bony wall between the SS pouch and the mastoid portion of the facial canal was 4.65 mm thick.

Conclusion: The marked venous encroachments into the mastoid region emphasise the necessity for comprehensive preoperative imaging and careful selection of surgical approaches to prevent inadvertent vascular compromise.

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乙状窦乳突袋-一种特殊的解剖变异。

目的：硬脑膜乙状窦（SS）是一个重要的外科标志。它的目的是报告一个非凡的和临床意义解剖变异-乳突囊的SS，它取代了乳突空气细胞。方法：对一名45岁男性的血管oct档案进行平面切片和三维体绘制的回顾性研究。结果：左侧SS发现一个膨胀的乳突囊，横径1.74 cm，矢状径2.18 cm，取代了典型的乳突空气细胞系统。SS囊延伸至乳突皮质，被强健（1.41 cm宽）的被盖乙状结肠窦覆盖。SS眼袋与面管乳突部分之间的骨壁厚度为4.65 mm。结论：乳突区明显的静脉侵犯强调了术前全面成像和谨慎选择手术入路的必要性，以防止无意的血管损害。

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.