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

Uzel, A.-P.; Bulla, Antonio; Joye, M. Laurent; Caix, P.

doi:10.1016/j.morpho.2012.07.001

Cited by 9 publications

(9 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…No punho, o nervo ulnar passa por um túnel fibro-ósseo conhecido como "canal de Guyon" ou "túnel ulnar distal" (1,2) . O canal de Guyon estende-se desde o ligamento palmar do carpo na borda proximal do osso pisiforme até o hâmulo do osso hamato -uma distância de aproximadamente 4 cm (1,2) . A importância clínica deste túnel é que ele pode se tornar um local de compressão do nervo ulnar (1) .…”

Section: Introductionunclassified

“…A variedade de causas determinada para tal compressão inclui trauma, lipoma, falso aneurisma da artéria ulnar, ventres musculares aberrantes e cisto ganglionar -causa mais frequente: 50% dos casos (1,3,4) . A síndrome do canal de Guyon é menos comum que a síndrome do túnel do carpo (2,4) . A existência de variações musculares no canal de Guyon raramente está associada à compressão do nervo ulnaraproximadamente 2,9% dos casos (2) .…”

Section: Introductionunclassified

“…A síndrome do canal de Guyon é menos comum que a síndrome do túnel do carpo (2,4) . A existência de variações musculares no canal de Guyon raramente está associada à compressão do nervo ulnaraproximadamente 2,9% dos casos (2) . O músculo abdutor do dedo mínimo geralmente se origina do osso pisiforme, do flexor ulnar do carpo e do ligamento pisiforme-hamato, se inserindo no lado ulnar da base da falange proximal do dedo mínimo (2,5,6,7) .…”

Section: Introductionunclassified

“…A existência de variações musculares no canal de Guyon raramente está associada à compressão do nervo ulnaraproximadamente 2,9% dos casos (2) . O músculo abdutor do dedo mínimo geralmente se origina do osso pisiforme, do flexor ulnar do carpo e do ligamento pisiforme-hamato, se inserindo no lado ulnar da base da falange proximal do dedo mínimo (2,5,6,7) . O tendão deste músculo divide-se em duas partes que estão ligadas ao lado ulnar da porção proximal do músculo extensor do dedo mínimo (5,6,7,8) .…”

Section: Introductionunclassified

See 3 more Smart Citations

Músculo abdutor do dedo mínimo acessório causando a Síndrome Do Túnel Ulnar – diagnóstico ultrassonográfico

Santos¹

2019

Rev. Hosp. Univ. UFPI

View full text Add to dashboard Cite

No punho, o nervo ulnar passa por um túnel fibro-ósseo conhecido como "canal de Guyon" ou "túnel ulnar distal". O canal de Guyon estende-se desde o ligamento palmar do carpo na borda proximal do osso pisiforme até o hâmulo do osso hamato – uma distância de aproximadamente 4 cm. A importância clínica deste túnel é que ele pode se tornar um local de compressão do nervo ulnar. O músculo abdutor do dedo mínimo é o músculo hipotenar mais variável - 24% da prevalência, e os pesquisadores têm especulado sua relação com a compressão do nervo ulnar no canal de Guyon.O músculo acessório passa anteriormente ao feixe neurovascular ulnar.

show abstract

Section: Introductionunclassified

See 2 more Smart Citations

Músculo abdutor do dedo mínimo acessório causando a Síndrome Do Túnel Ulnar – diagnóstico ultrassonográfico

Santos¹

2019

Rev. Hosp. Univ. UFPI

View full text Add to dashboard Cite

show abstract

“…4 Ulnar nerve compression syndrome at the wrist is rarer than carpal tunnel or ulnar compression at the elbow. 5,6 Idiopathic and traumatic causes would be most common 7 ; cysts and ganglia would be primary alternatives, 8,9 following anomalous muscles or tendons, 10,11 periarthritis, 12 and tumors as lipomas [13][14][15] and giant cell tumor. 16 Occupational or traumatic hyperactivity can cause neurovascular syndromes in the Guyon channel.…”

Section: Introductionmentioning

confidence: 99%

Digital Traumatic Fistula and Arteriovenous Malformation in a Patient with Ulnar Nerve Compression Syndrome

Oliveira¹,

Salles-Cunha²

2017

Journal for Vascular Ultrasound

View full text Add to dashboard Cite

Objective.-Ulnar nerve compression, the Guyon's canal syndrome, is more unusual than carpal tunnel disorders. An exceptional case of a patient with vascular and neurogenic signs and symptoms is described.Patient Presentation.-A 26-year-old female physiotherapist presented with neurogenic and arteriovenous signs and symptoms involving the right hand. The patient described fourth fi nger and wrist pain with fl exion, and pain and itching extending to arm and forearm. Sensations worsened when exposed to air conditioning. Enlarged vessels were noted in the medial aspect of the fourth digit; trauma occurred 8 years earlier during attempts to open a nail polish container.Methods.-Color fl ow, duplex-Doppler ultrasonography (US) of the subclavian to digital vessels was performed using 3-to 13-MHz transducers. Interpretation focused on fl ow waveforms obtained with the hand open and closed, having the left extremity as reference. Thermography was performed with camera Flir 15, room temperature at 21°C (70°F) and relative humidity at 48%.Results.-Right subclavian to digital arteries had high diastolic fl ow with opened hand. Hand closure interrupted diastolic fl ow except in the ulnar circulation to the fourth digit. Common digital arteries feeding digits 3-4 and 4-5 had signifi cantly more diastolic fl ow than the artery feeding digits 2-3. Diastolic fl ow through a dilated ulnar artery despite hand closure was associated to a millimetric arteriovenous fi stula in the fourth fi nger. Hyperthermia saturating at 35°C (95°F) showed channel-like images over the ulnar nerve and artery and fourth digit, compared with 20°C (68°F) for digit 2.Conclusions.-US and thermography demonstrated high fl ow and hyperthermia associated with a fourth digit fi stula and abnormal vessels, and ulnar artery dilatation likely associated with ulnar nerve injury. A coadjuvant diagnosis of Guyon's canal syndrome at the wrist was raised.

show abstract

Variation in the hypothenar muscles and its impact on ulnar tunnel syndrome

et al. 2013

View full text Add to dashboard Cite

Compression of the ulnar nerve at Guyon's canal can be caused not only by tumor-like structures, a fibrotic arch, a ganglion, lipoma, aneurysm or thrombosis but also by anomalous hypothenar muscles which are reviewed here. For the search of relevant papers, PubMed and crucial anatomical textbooks were consulted. The abductor digiti minimi is the most variable hypothenar muscle. It can possess one to three muscle bellies. Additional heads can arise from the flexor retinaculum, the palmaris longus tendon, the pronator quadratus tendon or the deep fascia of the palmar side of the forearm. Our own case of an aberrant abductor digiti minimi appearing like connective tissue and originating in the antebrachial fascia is included here. Hematoxylin and eosin staining revealed that macroscopically non-muscle-like tissue contained skeletal muscle tissue. The muscle itself resembled other described cases. In addition, at the flexor digiti minimi accessory heads with origin from the flexor retinaculum, the antebrachial fascia or the long flexor muscles of the forearm can be detected. By contrast, the opponens digiti minimi mostly lacks variations and is sometimes missing. In our opinion, this is due to its hidden location. However, in few cases an additional head can arise from the lower arm aponeurosis. Furthermore, additional (fourth) hypothenar muscles might be expressed. These muscles are characterized by origins in the forearm and insertions on the head of the 5th metacarpal bone or on the 5th proximal phalanx. It must be noted that accessory hypothenar muscles might look like connective tissue at first glance. Often their origin extends to the antebrachial fascia. This can be explained by the phylogenetic fact that all intrinsic muscles of the hand are derived from muscle masses that originated in the forearm. In the opinion of several authors, ulnar nerve compression mostly is evoked by hyper trophied variant hypothenar muscles due to overuse as for example in carpenters. In some rare cases, an aberrant hypothenar muscle can also evoke median nerve compression.

show abstract

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

Cited by 9 publications

References 43 publications

Músculo abdutor do dedo mínimo acessório causando a Síndrome Do Túnel Ulnar – diagnóstico ultrassonográfico

Músculo abdutor do dedo mínimo acessório causando a Síndrome Do Túnel Ulnar – diagnóstico ultrassonográfico

Digital Traumatic Fistula and Arteriovenous Malformation in a Patient with Ulnar Nerve Compression Syndrome

Variation in the hypothenar muscles and its impact on ulnar tunnel syndrome

Contact Info

Product

Resources

About