A case report of bilateral atypical origin of pectoralis minor.

IF 1.4 4区医学 Q2 Medicine

Surgical and Radiologic Anatomy Pub Date : 2024-08-01 Epub Date: 2024-06-10 DOI:10.1007/s00276-024-03407-9

Eren Ogut, Serdar Bagci, Gonul Kotil Aslan, Pedram Turkoglu, Merve Falay, Cagatay Barut

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Abstract

Purpose: In the existing literature, various insertion variations and classifications for the Pectoralis Minor (PMi) muscle have been reported. However, there is limited information on inferior origin variations of the PMi muscles and a certain classification is lacking.

Case presentation: During routine cadaver dissection of an adult male, variations in the origin of the bilateral PMi muscles were identified. Morphometric measurements of the PMi were conducted using ImageJ software, and the unusual origin patterns of the PMi were categorized into specific types. The PMi muscle demonstrated a bilateral variations. On the right side, the PMi displays a bifid structure comprising medial and lateral fibers. The left PMi originate from the superolateral margins of the 4th to 6th costae and terminate at the anterosuperior surface of the coracoid process. The length of the right medial fiber before merging was 5.67 ± 0.04 cm, while that of the right lateral fiber was 6.68 ± 0.05 cm. The distance between the two fibers was measured as 0.43 cm, with a length of 3.33 ± 0.02 cm. The length and diameter of the muscle fibers extending to the 6th costa were 2.63 ± 0.01 cm and 0.46 cm, respectively.

Conclusions: Potential variations in PMi arising from impairment during development may occasionally manifest as asymptomatic conditions or predispose individuals to shoulder impingement, rotator cuff dysfunction, shoulder-related disorders, and functional impairments. Therefore, careful attention to this variation is considered in surgical planning.

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胸小肌双侧非典型起源的病例报告。

目的：现有文献报道了小胸肌（PMi）的各种插入变异和分类。然而，关于小胸肌下端起源变异的资料却很有限，也缺乏一定的分类方法：病例介绍：在对一名成年男性进行常规尸体解剖时，发现了双侧 PMi 肌肉起源的变化。使用 ImageJ 软件对 PMi 进行形态测量，并将 PMi 的异常起源模式分为特定类型。PMi 肌肉表现出双侧变异。右侧的腓肠肌呈现由内侧和外侧纤维组成的双叉结构。左侧的腓肠肌起源于第4至第6肋骨的上外侧缘，终止于冠突的前上表面。合并前右侧内侧纤维的长度为 5.67 ± 0.04 厘米，右侧外侧纤维的长度为 6.68 ± 0.05 厘米。两根纤维之间的距离为 0.43 厘米，长度为 3.33 ± 0.02 厘米。延伸至第 6 肋骨的肌纤维长度和直径分别为 2.63 ± 0.01 厘米和 0.46 厘米：结论：由于发育过程中的损伤而导致的PMi的潜在变异可能偶尔会表现为无症状的情况，也可能导致肩关节撞击、肩袖功能障碍、肩关节相关疾病和功能障碍。因此，在制定手术计划时应仔细考虑这种变异。

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.