Guyon's canal syndrome resulting from an ulnar artery aneurysm: A case report

Introduction and importance: The ulnar's nerve compression at the Guyon's canal is not a frequent entity add to it that vascular lesions are rarely involved as a causative agent of this syndrome. Case presentation: We report a case of a young male patient admitted in our department for a Guyon's canal syndrome due to an aneurysm of the ulnar artery and underwent a surgical decompression. Post-operative course was uneventful and the patient was satisfied with the result. Clinical discussion: Many etiologies are involved in the Guyon's canal syndrome and these etiologies can be arranged into groups. Previous treatment attempts, the duration and severity of the symptoms and the underlying etiology dictate the treatment options. Adjacent vascular enlargement is not a usual cause of Guyon's canal compression and a few case reports were reported in the literature. Surgical treatment by opening and releasing the roof of Guyon's canal and removing the aneurysm helped to achieve good outcome in most reports. Conclusion: Guyon's canal syndrome is less frequent than both cubital tunnel syndrome or carpal tunnel syndrome and many causative agents have been described. Vascular lesions are not the usual cause of compressing the ulnar nerve at the wrist and through this case we spotlighted this entity as another possible etiology requiring an adequate treatment for a better outcome.