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Guyon's Canal Syndrome Secondary to Ulnar Artery Stenosis Caused by a Constricting Fibrous Band; a Rare Cause of Ulnar Nerve Compression
(Ortadogu Ad Pres & Publ Co, 2011) Dogramaci, Yunus; Kalacı, Aydıner; Esen, Erdinc; Sevinc, Teoman T.; Emir, Anil; Yanat, Ahmet Nedim
Guyon's canal is not a common site of ulnar nerve compression at the wrist. Ganglia, lipoma, anomalous tendons and muscles, trauma related to an occupation, arthritis, and carpal bone fractures can cause ulnar nerve compression at the wrist. Ulnar nerve compression at Guyon's canal secondary to pathologic conditions involving the ulnar artery is also rare. Ulnar artery aneurysm, tortuous ulnar artery, hemangioma, and thrombosis have been reported in the literature as vascular lesions. However, ulnar nerve compression at Guyon's canal by a constricting fibrous band has not been reported. The authors experienced a case of ulnar nerve compression at Guyon's canal by a constricting fibrous band and the patient's symptoms improved after surgical resection. This report is, to the best of our knowledge, the first on ulnar neuropathy in the Guyon's canal caused by a constricting fibrous band of the ulnar artery. We can not easily predict constricting fibrous band as a cause of ulnar nerve compression at Guyon's canal. However, if there is not an obvious etiology, we should consider a constricting fibrous band as another possible etiology.