open access
A rare unreported bilateral thoracic muscle on the inferior and posteromedial aspect of the rib cage: case report and literature review
Affiliations- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, United States
- Department of Ophthalmology and Visual Science, Albert Einstein College of Medicine, Bronx, NY, United States
open access
Abstract
Thoracic wall muscles are essential for respiration. Few anatomical variations in thoracic wall muscles have been reported. Such variants must be considered during surgical procedures that involve the thorax muscles. During routine dissection of a 65-year-old male cadaver as part of a fourth-year clinical anatomy elective, additional muscle strips were found in the inner and inferior aspect of the rib cage closer to the posteromedial body wall. The muscle consisted of two strips of narrow muscle fibres originating from the inferior borders of ribs 11 and 12 that radiated to insert on the transverse processes of the T11 and T12 vertebrae. The case report describes an unusual, novel medial thoracic wall muscle that has not been previously described in the literature. Variations in thoracic muscles can affect respiratory function and surgical interventions like chest tube placement and needle therapy for local anaesthesia, therefore, it is important for clinicians to be aware of such variants.
Abstract
Thoracic wall muscles are essential for respiration. Few anatomical variations in thoracic wall muscles have been reported. Such variants must be considered during surgical procedures that involve the thorax muscles. During routine dissection of a 65-year-old male cadaver as part of a fourth-year clinical anatomy elective, additional muscle strips were found in the inner and inferior aspect of the rib cage closer to the posteromedial body wall. The muscle consisted of two strips of narrow muscle fibres originating from the inferior borders of ribs 11 and 12 that radiated to insert on the transverse processes of the T11 and T12 vertebrae. The case report describes an unusual, novel medial thoracic wall muscle that has not been previously described in the literature. Variations in thoracic muscles can affect respiratory function and surgical interventions like chest tube placement and needle therapy for local anaesthesia, therefore, it is important for clinicians to be aware of such variants.
Keywords
anatomical variations, rare thoracic wall muscle, rib cage, posteromedial wall, T11 and T12 vertebrae
About this articleTitle
A rare unreported bilateral thoracic muscle on the inferior and posteromedial aspect of the rib cage: case report and literature review
Journal
Issue
Article type
Case report
Pages
422-423
Published online
2022-03-22
Page views
2170
Article views/downloads
745
DOI
Pubmed
Bibliographic record
Folia Morphol 2023;82(2):422-423.
Keywords
anatomical variations
rare thoracic wall muscle
rib cage
posteromedial wall
T11 and T12 vertebrae
Authors
A. Lee
C. Dean
K. Labagnara
D. Jun Yun
A. Pinkas
P. L. Mishall
References (3)- Keith L, Moore AMRA, Dalley AF. Essential Clinical Anatomy. 5th ed. Lippincott Williams & Wilkins, Philadelphia 2015.
- Raikos A, Paraskevas GK, Tzika M, et al. Sternalis muscle: an underestimated anterior chest wall anatomical variant. J Cardiothorac Surg. 2011; 6: 73.
- Tang A, Bordoni B. Anatomy, Thorax, Muscles. StatPearls, Treasure Island 2021.
