open access

Vol 82, No 2 (2023)
Case report
Submitted: 2022-02-03
Accepted: 2022-03-08
Published online: 2022-03-22
Get Citation

A rare unreported bilateral thoracic muscle on the inferior and posteromedial aspect of the rib cage: case report and literature review

A. Lee1, C. Dean1, K. Labagnara1, D. Jun Yun1, A. Pinkas1, P. L. Mishall12
·
Pubmed: 35347697
·
Folia Morphol 2023;82(2):422-423.
Affiliations
  1. Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, United States
  2. Department of Ophthalmology and Visual Science, Albert Einstein College of Medicine, Bronx, NY, United States

open access

Vol 82, No 2 (2023)
CASE REPORTS
Submitted: 2022-02-03
Accepted: 2022-03-08
Published online: 2022-03-22

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.

Get Citation

Keywords

anatomical variations, rare thoracic wall muscle, rib cage, posteromedial wall, T11 and T12 vertebrae

About this article
Title

A rare unreported bilateral thoracic muscle on the inferior and posteromedial aspect of the rib cage: case report and literature review

Journal

Folia Morphologica

Issue

Vol 82, No 2 (2023)

Article type

Case report

Pages

422-423

Published online

2022-03-22

Page views

2173

Article views/downloads

747

DOI

10.5603/FM.a2022.0028

Pubmed

35347697

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)
  1. Keith L, Moore AMRA, Dalley AF. Essential Clinical Anatomy. 5th ed. Lippincott Williams & Wilkins, Philadelphia 2015.
  2. Raikos A, Paraskevas GK, Tzika M, et al. Sternalis muscle: an underestimated anterior chest wall anatomical variant. J Cardiothorac Surg. 2011; 6: 73.
  3. Tang A, Bordoni B. Anatomy, Thorax, Muscles. StatPearls, Treasure Island 2021.

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