open access

Vol 78, No 4 (2019)
CASE REPORTS
Published online: 2019-04-03
Submitted: 2019-02-08
Accepted: 2019-03-15
Get Citation

An unusual case of unilateral supernumerary extensor carpi radialis muscle

L. Grigoriță, C. Gug, M.A. Vaida, A.M. Jianu, N.S. Damen
DOI: 10.5603/FM.a2019.0037
·
Pubmed: 30949998
·
Folia Morphol 2019;78(4):888-892.

open access

Vol 78, No 4 (2019)
CASE REPORTS
Published online: 2019-04-03
Submitted: 2019-02-08
Accepted: 2019-03-15

Abstract

An uncommon anatomical variant of muscle that can be considered as a supernumerary extensor carpi radialis muscle was found during the dissection of the forearm region. The identified extensor carpi radialis muscle has origin on the lateral supraepicondylar ridge of the humerus, and an unusual insertion on the tubercle of the scaphoid bone. The presence of this supernumerary muscle may cause diagnostic errors in the forearm region, and can produce a debilitating pain syndrome by secondary compression of adjacent nerves, vessels or tendons due to its course along the anterior compartment of the forearm.

Abstract

An uncommon anatomical variant of muscle that can be considered as a supernumerary extensor carpi radialis muscle was found during the dissection of the forearm region. The identified extensor carpi radialis muscle has origin on the lateral supraepicondylar ridge of the humerus, and an unusual insertion on the tubercle of the scaphoid bone. The presence of this supernumerary muscle may cause diagnostic errors in the forearm region, and can produce a debilitating pain syndrome by secondary compression of adjacent nerves, vessels or tendons due to its course along the anterior compartment of the forearm.

Get Citation

Keywords

supernumerary muscle, forearm, extensor carpi radialis longus muscle

About this article
Title

An unusual case of unilateral supernumerary extensor carpi radialis muscle

Journal

Folia Morphologica

Issue

Vol 78, No 4 (2019)

Pages

888-892

Published online

2019-04-03

DOI

10.5603/FM.a2019.0037

Pubmed

30949998

Bibliographic record

Folia Morphol 2019;78(4):888-892.

Keywords

supernumerary muscle
forearm
extensor carpi radialis longus muscle

Authors

L. Grigoriță
C. Gug
M.A. Vaida
A.M. Jianu
N.S. Damen

References (23)
  1. Albright JA, Linburg RM. Common variations of the radial writs extensors. J Hand Surg Am. 1978; 3(2): 134–138.
  2. Arey LB. Developmental Anatomy, In: A Textbook and Laboratory Manual of Embryology. Ed. 5. WB Saunders company, Philadelphia 1949: 397–399.
  3. Botar J. Sur quelques variations des muscles de l'avant-bras. Bulletins et Mémoires de la Société d'anthropologie de Paris. 1931; 2(1): 25–33.
  4. Claassen H, Wree A. Multiple variations in the region of Mm. extensores carpi radialis longus and brevis. Ann Anat. 2002; 184(5): 489–491.
  5. Cossu F, Guintard C. Anatomical and Descriptive Study of the Radial Extensor Muscle (M. Extensor Carpi Radialis). Anatomia, Histologia, Embryologia: Journal of Veterinary Medicine Series C. 2000; 29(6): 337–343.
  6. Divia Paul A, Gaikwad MR. Additional muscle belly and abberant muscle fibers over the extensor retinaculam of wrist. NUJHS. 2016; 6(1): 85–87.
  7. Gitto S, Draghi AG, Draghi F. Sonography of non-neoplastic disorders of the hand and wrist tendons. J Ultrasound Med. 2018; 37(1): 51–68.
  8. Hale SJM, Mirjalili SA, Stringer MD. Inconsistencies in surface anatomy: The need for an evidence-based reappraisal. Clin Anat. 2010; 23(8): 922–930.
  9. Hong MKY, Hong MKH. An uncommon form of the rare extensor carpi radialis accessorius. Ann Anat. 2005; 187(1): 89–92.
  10. Kerver ALA, Carati L, Eilers PHC, et al. An anatomical study of the ECRL and ECRB: feasibility of developing a preoperative test for evaluating the strength of the individual wrist extensors. J Plast Reconstr Aesthet Surg. 2013; 66(4): 543–550.
  11. Nayak S, Kumar SJM, Krishnamurthy A, et al. An additional radial wrist extensor and its clinical significance. Ann Anat. 2007; 189(3): 283–286.
  12. Rai R, Ranade A, Prabhu L, et al. Multiple variations of extensor muscles of forearm in relation to the radial nerve: a case report and review. Int J Morphol. 2008; 26(2): 447–49.
  13. Ravichandiran M, Ravichandiran N, Ravichandiran K, et al. Neuromuscular partitioning in the extensor carpi radialis longus and brevis based on intramuscular nerve distribution patterns: A three-dimensional modeling study. Clin Anat. 2012; 25(3): 366–372.
  14. Ryu JY, Watson HK. SSMB syndrome. Symptomatic supernumerary muscle belly syndrome. Clin Orthop Relat Res. 1987(216): 195–202.
  15. Sadler TW. Langman’s medical embryology. Ed. 13. Williams and Wilkin, Lippincott 2015: 203–206.
  16. Sawant SP. The cadaveric study of extensor carpi radialis longus muscle on the developmental basis. Int J Healthcare Biomed Res. 2013; 1(4): 241–245.
  17. Smith J, Pourcho AM, Kakar S. Sonographic appearance of the extensor carpi radialis intermedius tendon. PMR. 2015; 7(7): 789–791.
  18. Sookur PA, Naraghi AM, Bleakney RR, et al. Accessory muscles: anatomy, symptoms, and radiologic evaluation. Radiographics. 2008; 28(2): 481–499.
  19. Srimani P, Meyur R, De Bo, et al. Unilateral variation of extensor carpi radialis longus muscle: a case report. Int J Anat Var. 2014; 7: 115–117.
  20. Tubbs RS, Shoja MM, Loukas M. Bergman’s Comprehensive Encyclopedia of Human Anatomic Variation. Wiley-Blackwell 2016: 304–314.
  21. West CT, Ricketts D, Brassett C. An anatomical study of additional radial wrist extensors including a unique extensor carpi radialis accessorius. Folia Morphol. 2017 [Epub ahead of print]; 75(4): 742–747.
  22. Yang K, Choi IJ, Lee JH. Accessory head of the extensor carpi radialis longus muscle merging with extensor carpi radialis brevis muscle. Surg Radiol Anat. 2018; 40(9): 1001–1003.
  23. Yoshida Y. Anatomical studies on the extensor carpi radialis longus and brevis muscles in Japanese. Okajimas Folia Anat Jpn. 1994; 71(2-3): 127–135.

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