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Case Reports
. 2024 Jun;46(6):771-776.
doi: 10.1007/s00276-024-03360-7. Epub 2024 Apr 18.

Superficial branch of the radial nerve passing through the supinator canal, emerging between the extensor digitorum and abductor pollicis longus muscles and consequently supplying the second finger and radial portion of the third finger: a case report and clinical implications

Anhelina Khadanovich  1   2 , Michal Benes  1   2 , Radek Kaiser  2   3 , David Kachlik  4   5   6
Affiliations
Case Reports

Superficial branch of the radial nerve passing through the supinator canal, emerging between the extensor digitorum and abductor pollicis longus muscles and consequently supplying the second finger and radial portion of the third finger: a case report and clinical implications

Anhelina Khadanovich et al. Surg Radiol Anat. 2024 Jun.

Abstract

Awareness of unique path of the superficial branch of the radial nerve and its unusual sensory distribution can help avoid potential diagnostic confusion. We present a unique case encountered during a routine dissection of a Central European male cadaver. An unusual course of the superficial branch of the radial nerve was found in the right forearm, where the superficial branch of the radial nerve originated from the radial nerve distally, within the supinator canal, emerged between the extensor digitorum and abductor pollicis longus muscles and supplied the second and a radial half of the third digit, featuring communications with the lateral antebrachial cutaneous nerve and the dorsal branch of the ulnar nerve. Due to dorsal emerging of the superficial branch of the radial nerve the dorsal aspect of the thumb was innervated by the lateral antebrachial cutaneous nerve. To our best knowledge such variation of the superficial branch of the radial nerve has never been reported before. This variation dramatically changes aetiology and manifestation of possible entrapment syndromes which clinicians should be aware of.

Keywords: Communication; Lateral antebrachial cutaneous nerve; Sensory distribution; Superficial branch of radial nerve; Supinator canal; Variation.

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References

    1. Appleton AB (1911) A case of abnormal distribution of the n. musculo-cutaneus, with complete absence of the ramus cutaneus n. radialis. J Anat Physiol 46(Pt1):89 - PubMed - PMC
    1. Bergman RA, Afifi AK, Miyauchi R (1992–2004) Opus II: Cardiovascular System: Arteries: Upper Limb. In: Illustrated Encyclopedia of Human Anatomic Variation. Available via DIALOG: http://www.anatomyatlases.org/AnatomicVariants/NervousSystem/Text/Radial... (Accessed March 12, 2024)
    1. Diogo R, Siomava N, Gitton Y (2019) Development of human limb muscles based on whole-mount immunostaining and the links between ontogeny and evolution. Development 1;146(20):dev180349. https://doi.org/10.1242/dev.180349
    1. Herma T, Baca V, Yershov D, Kachlik D (2017) A case of a duplicated superficial branch of radial nerve and a two-bellied brachioradialis muscle presenting a potential entrapment syndrome. Surg Radiol Anat 39:451–454. https://doi.org/10.1007/s00276-016-1732-8 - DOI - PubMed
    1. Herma T, Slezak J, Baca V, Kachlik D (2023) Duplicated superficial branch of the radial nerve and brachioradialis muscle belly: prevalence and significance. Folia Morphol 82(3):558–561. https://doi.org/10.5603/fm.a2022.0064 - DOI

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