Ulnar Nerve Compression Due to an Anomalous Muscle in the Canal of Guyon

Swanson, Alfred B.; Biddulph, S.L.; Baughman, Fred A.; Groot, G de

doi:10.1097/00003086-197203000-00011

Cited by 41 publications

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“…The majority are found during cadaveric dissections and the rest are observed in the symptomatic cases (Jeffery, 1971;Swanson et al, 1972;Salgeback, 1977;James et al, 1987;Sheppard et al, 1991;Netscher and Cohen, 1997;Santoro et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Anatomical variations as potential risk factors for ulnar tunnel syndrome: A cadaveric study

et al. 2005

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The aim of this study was to assess the anatomical variations, especially the anomalous muscles passing through Guyon's canal and the fibrous arch forming the piso-hamate hiatus, which may play a role in ulnar tunnel syndrome. We have also focused on the relation of these structures with specific concern to the ulnar nerve. Nineteen embalmed cadavers (37 hands and forearms) were dissected. A fibrous arch extending between the pisiform and the hook of the hamate was observed in 21 hands. In majority of the cases flexor digiti minimi muscle was found to originate only from this arch. An anomalous muscle was disclosed in six hands with four of them passing through the piso-hamate hiatus with the deep branch of the ulnar nerve. In two of four cases, the superficial branch of the ulnar nerve was also accompanying the deep branch of the ulnar nerve beneath the anomalous muscle and through the piso-hamate hiatus. Because these anomalous muscles were generally found to course through the piso-hamate hiatus with the branches of the ulnar nerve, we conclude that the distal portion of the Guyon's canal has a relatively higher risk for ulnar nerve entrapment. We believe that surgeons operating on this region should take into account these various anatomic structures.

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Section: Introductionmentioning

confidence: 99%

Anatomical variations as potential risk factors for ulnar tunnel syndrome: A cadaveric study

et al. 2005

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“…It seems more correct to consider the accessory palmaris as an accessory belly of either the abductor minimi digiti or the flexor minimi digiti when it is inserted into one of these muscles [14]. Reported accessory origins of the ADMM arise from the flexor retinaculum [4,11,[29][30][31]34,[36][37][38]43,45,47], the tendon of the flexor carpi ulnaris [49], the palmaris longus tendon as in our case [3,6,8,10,16,18,23,28,30,32,33,[38][39][40][41]43,50,54,55], the forearm fascia [5,7,8,11,14,17,[19][20][21][25][26][27][29][30][31][32]…”

Section: Classical Anatomy Of the Hypothenar Musclementioning

confidence: 96%

“…Anomalous muscles within Guyon's canal are a common finding and are of clinical significance as they can cause ulnar nerve compression [10,14,[16][17][18]20,24,27,28,32,34,35,37,40,51,55]. Anomalous forms of abductor digiti minimi muscle (ADMM) represent 61.5% [26] of the anomalous muscles and are most commonly reported ( Table 1 ).…”

Section: Introductionmentioning

confidence: 99%

Variation of the proximal insertion of the abductor digiti minimi muscle: Correlation with Guyon's canal syndrome? Case report and literature review

et al. 2012

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“…Lediglich Wilhelm [ 1958] [Reim annetal.. 1944: Jeffery. 1971: Swanson et al. 1972: Still und Kleinert.…”

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In 40 hands of adults the ‘loge de Guyon’ a narrow bounded area within the proximal hypothenar region, has been dissected to realize an exact determination of the important characteristics of size. Beside measurements of the wall structures in the region of the pisiform bone, the hook of hamate and the entrances of the loge, variations of muscles and the position of the ulnar artery and nerve with their terminal branches have also been examined.The deep palmar branch of the ulnar artery crosses the rami of the ulnar nerve on the palmar side in 65% of cases. The branch of the artery crosses on the dorsal side in 30% and in 5% the ramus profundus of the ulnar artery runs between both terminal branches of the ulnar nerve. The clinical significance of the loge is emphasized, whereas the irregular nomenclature in the national and international literature is discussed in detail.

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Ulnar Nerve Compression Due to an Anomalous Muscle in the Canal of Guyon

Cited by 41 publications

References 0 publications

Anatomical variations as potential risk factors for ulnar tunnel syndrome: A cadaveric study

Anatomical variations as potential risk factors for ulnar tunnel syndrome: A cadaveric study

Variation of the proximal insertion of the abductor digiti minimi muscle: Correlation with Guyon's canal syndrome? Case report and literature review

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