Ulnar tunnel syndrome caused by two anomalous muscle bellies: a rare etiology of dynamic ulnar nerve compression - 13/05/26
, Laura Hilbig-Vlatten b, Arriyan S. Dowlatshahi bHighlights |
• | Dual anomalous muscle bellies caused ulnar tunnel syndrome. |
• | First reported case of this anatomical configuration producing UTS. |
• | Aberrant muscles produced dynamic ulnar nerve compression at Guyon’s canal. |
• | Surgical excision led to durable symptom resolution at 5-year follow-up. |
Abstract |
Ulnar tunnel syndrome, or Guyon’s canal syndrome, is an uncommon compressive neuropathy of the ulnar nerve at the wrist. While most cases result from trauma or ganglion cysts, anomalous muscles are rare. This case describes an ulnar tunnel syndrome caused by two anomalous muscle bellies crossing the ulnar neurovascular bundle in a 64-year-old man with recurrent ulnar neuropathy and intrinsic hand atrophy. Surgical excision and decompression resulted in durable symptom resolution at 5-year follow-up.
This case highlights the importance of considering anatomical variations in persistent or recurrent ulnar symptoms, particularly after prior proximal decompression.
Le texte complet de cet article est disponible en PDF.Keywords : Ulnar tunnel syndrome, Ulnar neuropathy at the wrist, Aberrant muscle, Nerve compression, Guyon’s canal syndrome
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