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A case report of bilateral atypical origin of pectoralis minor.

Authors :
Ogut E
Bagci S
Aslan GK
Turkoglu P
Falay M
Barut C
Source :
Surgical and radiologic anatomy : SRA [Surg Radiol Anat] 2024 Aug; Vol. 46 (8), pp. 1373-1378. Date of Electronic Publication: 2024 Jun 10.
Publication Year :
2024

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.<br />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.<br />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.<br /> (© 2024. The Author(s), under exclusive licence to Springer-Verlag France SAS, part of Springer Nature.)

Details

Language :
English
ISSN :
1279-8517
Volume :
46
Issue :
8
Database :
MEDLINE
Journal :
Surgical and radiologic anatomy : SRA
Publication Type :
Academic Journal
Accession number :
38858313
Full Text :
https://doi.org/10.1007/s00276-024-03407-9