Variant of the Anconeus Epitrochlearis Muscle: A Case Report

Massrey, Chrissie; Iwanaga, Joe; Ishak, Basem; Oskouian, Rod J.; Loukas, Marios; Tubbs, R. Shane

doi:10.7759/cureus.3201

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…This variant takes its origin in the medial epicondyle of the humerus and extends to the olecranon proximally to the origin of the FCU. However, a type of AEM originating in the triceps brachii muscle and twice the length of the usual type has also been reported (Massrey et al, 2018). The presence of an AEM can be correlated with a prominent medial head of the triceps brachii, which may exacerbate the symptoms of UN neuropathy by exerting pressure against the medial epicondyle (Cammarata et al, 2019).…”

Section: Anconeus Epitrochlearismentioning

confidence: 99%

“…Such treatment is based mainly around splint elbow immobilization at 45° flexion in order to reduce pressure on the nerve. The surgical techniques can be divided into two types: those based on transposition and those based on decompression (Massrey et al, 2018). Complete excision of the AEM, together with the coexisting prominent part of the triceps brachii, is an acceptable approach and can prevent potential regrowth and the recurrence of compression (Nellans et al, 2014).…”

Section: Elbowmentioning

confidence: 99%

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Possible points of compression of the ulnar nerve: Tricks and traps that await clinicians from an anatomical point of view

et al. 2021

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The ulnar nerve can be subject to numerous types of compression. The most common are cubital tunnel and ulnar tunnel syndromes, but there are many others with more uncommon etiologies. The existence of additional communicating branches, median nerve involvement, various types of injuries, and unusual anatomical variations can be a challenge for both diagnosis and treatment. This review presents a comprehensive depiction of ulnar nerve entrapment syndromes with particular reference to their anatomical background, risk factors, and clinical evaluation. Even common disorders can result from atypical morphological changes. It is important to be familiar with them as it is a key ability in daily medical practice.

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Section: Anconeus Epitrochlearismentioning

confidence: 99%

Section: Elbowmentioning

confidence: 99%

Possible points of compression of the ulnar nerve: Tricks and traps that await clinicians from an anatomical point of view

et al. 2021

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A rare presentation of cubital tunnel syndrome by accessory anconeus muscle

Gadiraju,

Thangam,

Radhan

et al. 2024

IJMSR

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Cubital tunnel syndrome (Cu TS) is the second most frequent upper extremity compressive neuropathy after carpal tunnel syndrome. Cu TS is idiopathic; however, it has been linked to ulnar nerve vulnerability and anconeus epitrochlearis (AE) muscle hypertrophy. Although there are few studies in the literature that reveal AE muscle as one of the causes of Cu TS, its prevalence is low. The goal of this case report is to raise awareness regarding the existence of AE muscle as a potential cause of Cu TS, as well as the imaging findings of Cu TS in magnetic resonance imaging (MRI). A 17-year-old male patient complained of intermittent pain in the medial aspect of the left elbow and paresthesia in the left hand. Examination revealed hyperextension of meta carpalphalangeal joints and flexion of proximal interphalangeal joints of the 4th and 5th digits, besides the sensory deficit along the ulnar border of the 5th digit. A nerve conduction study revealed non-stimulable sensory and motor components of the right ulnar nerve. MRI with T1-weighted fast spin echo, Fat sat proton density-weighted, and gradient echo T2*-weighted sequence showed AE - on the posteromedial aspect of the elbow. The ulnar nerve within the cubital tunnel appeared thickened and edematous with bright perineural fat signals with maintained fascicular architecture, secondary to compression by the anconeus muscle. This paper reviews imaging findings of ulnar neuropathy secondary to accessory anconeus muscle and explains the importance of MRI imaging for accurate diagnosis. Knowing MRI imaging is vital in the modern imaging era for accurate diagnosis.

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Variant of the Anconeus Epitrochlearis Muscle: A Case Report

Cited by 2 publications

References 9 publications

Possible points of compression of the ulnar nerve: Tricks and traps that await clinicians from an anatomical point of view

Possible points of compression of the ulnar nerve: Tricks and traps that await clinicians from an anatomical point of view

A rare presentation of cubital tunnel syndrome by accessory anconeus muscle

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