International Journal of Anatomy and Research



Welcome to International Journal of Anatomy and Research

b2



b3

 

 

Type of Article : Case Report

Year: 2015 | Volume 3 | Issue 1 | Page No. 941-944

Date of Publication: 31-03-2015

DOI: http://dx.doi.org/10.16965/ijar.2015.122


BILATERAL PECTORALIS MINOR MUSCLE VARIANT: A CASE REPORT

David R Terfera *1, Anton Alder 2, Kevin R Kelliher 3.

*1 Assistant Professor, College of Naturopathic Medicine, University of Bridgeport, Bridgeport, CT 06604.
2College of Naturopathic Medicine, University of Bridgeport, Bridgeport, CT 06604.
3College of Naturopathic Medicine, University of Bridgeport, Bridgeport, CT 06604.

Address: David Terfera, Ph.D., University of Bridgeport, College of Naturopathic Medicine, 60 Lafayette Street, Bridgeport, CT 06604.
E-Mail: dterfera@bridgeport.edu

Abstract

During a routine anatomical dissection we discovered an aberrant muscle slip associated with the pectoralis minor muscle that occurred bilaterally.  The muscle slips originated from ribs five or six and inserted into the tendon of the coracobrachialis in close proximity the coracoid process of the scapula.  Fibers of the muscle slip also blended with the pectoralis minor muscle on its lateral border.   The muscle slips were innervated by the medial pectoral nerve.  Reports and documentation of anatomical variants such as this provide an important resource for both researchers and clinicians. 
KEY WORDS: Pectoralis Minor, Variant, Axilla, Coracobrachialis.

References

  1. Moore KL, Dalley AF, Agur, AM. Clinically oriented anatomy. Lippincott Williams and Wilkins, Baltimore. 2010; 697-699.
  2. Wood J.  Variations in human myology observed during the winter session of 1867-68 at King’s College London. Proc R Soc. 1867; 16:491-493.
  3. Testut L.  Les anomalies musculaires chez I’homme. Masson, Paris. 1884; 34-44.
  4. Le Double AF.  Traité des variations du système musculaire de l'homme et de leur signification au point de vue de l'anthropologie zoologique. Paris: Schleicher frères. 1897; 252–255.
  5. Taylor AE. Case of clavicular insertion of the pectoralis minor. J Anat Physiol. 1898; 32(2):218.
  6. Homsi C, Rodrigues MB, Silva JJ, Stump X, Morvan G.  Anomalous insertion of the pectoralis minor muscle: ultrasound findings. Journal de Radiologie. 2003; 84(9):1007-1011.
  7. Uzel AP, Bertino R, Caix P, Boileau P.  Bilateral variation of the pectoralis minor muscle discovered during practical dissection. Surg Radiol Anat. 2008; 30:679-682.
  8. Bannur BM, Mallashetty N, Endigeri P.  An accessory muscle of pectoral region. J Clin Diagn Res. 2013; 7(9):1994-1995.
  9. Hardy MA, Fabrizio PA. An accessory muscle of the thoracic wall. Int J Anat Var. 2009; 2:93-95.
  10. Del Sol M, Vásquez B.  Anatomical and clinical considerations of the pectoralis tertius muscle in man. Int J Morphol. 2009; 27(3):715-718.
  11. Lewis WH. In mall and keibel's manual of human embryology. Philadelphia. 1910; V. 1. 487.
  12. Testut L. Traité d'Anatomie humaine. Doin Ed, Paris. 1896; V. 1. 487, 725-8.
  13. Rai R, Ranade AV, Prabhu LV, Prakash, Rajanigandha V, Nayak SR. Unilateral pectoralis minimus muscle: a case report. Int J Morphol. 2008; 26(1):27–29.
  14. Moineau G, Cikes A, Trojani C, Boileau P. Ectopic insertion of the pectoralis minor: implication in the arthroscopic treatment of shoulder stiffness. Knee Surg Sports Traumatol Arthrosc. 2008; 16:869–871.
  15. Dumontier C, Sautet A, Gagey O, Apoil A. Rotator interval lesions and their relation to coracoid impingement syndrome. J Shoulder Elbow Surg. 1999; 8:130–135.
  16. Lee SJ, Ha DH, Lee SM. Unusual variation of the rotator interval: insertional abnormality of the pectoralis minor tendon and absence of the coracohumeral ligament. Skeletal Radiol. 2010; 39:1205–1209.
  17. Low SC, Tan SC. Ectopic insertion of the pectoralis minor muscle with tendinosis as a cause of shoulder pain and clicking. Clin Radiol. 2010; 65:254–256.
  18. Ranney D. Thoracic outlets: an anatomical redefinition that makes clinical sense. Clin Anat. 1996; 9(1):50-52.
  19. Sanders RJ. Recurrent neurogenic thoracic outlet syndrome stressing the importance of pectoralis minor syndrome. Vasc Endovascular Surg. 2011; 45(1):33-8.
  20. Fitzgerald G. Thoracic outlet syndrome of pectoralis minor etiology mimicking cardiac symptoms on activity: a case report. J Can Chiropr Assoc. 2012; 56(4):311-315.
  21. Manstein CH, Manstein G, Somers RG, Barwick WJ. Use of pectoralis minor muscle in immediate reconstruction of the breast. Plast Reconstr Surg. 1985; 76:566–569.
  22. Shah R, Kang N. Reconstruction in the axilla with a pedicled pectoralis minor muscle flap. Ann R Coll Surg Engl. 2006; 88(4):W9–W11.

 

David R Terfera, Anton Alder, Kevin R Kelliher. BILATERAL PECTORALIS MINOR MUSCLE VARIANT: A CASE REPORT. Int J Anat Res 2015;3(1):941-944. DOI: 10.16965/ijar.2015.122

b2



b3




Search

Volume 1 (2013)

Volume 2 (2014)

Volume 3 (2015)

Submit Manuscript