{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,9]],"date-time":"2026-09-09T22:08:24Z","timestamp":1788991704699,"version":"build-2803163510"},"reference-count":11,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2024,11,17]],"date-time":"2024-11-17T00:00:00Z","timestamp":1731801600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Reports"],"abstract":"<jats:p>Background and Clinical Significance: Guyon\u2019s canal syndrome is a pathological condition caused by compression of the ulnar nerve at the level of the wrist. It is less frequent than other compression syndromes of the upper limb (cubital and carpal tunnel), and different causative agents, including vascular lesions, are described. Among these, aneurysm of the ulnar artery is described in the literature as an infrequent aetiology. Case Presentation: We report the case of a 25-year-old young man with Guyon\u2019s canal syndrome caused by an aneurysm of the ulnar artery, who underwent surgical decompression of the Guyon\u2019s canal without intervening on the aneurysm. The postoperative course was free of complications, and the patient reported satisfaction, with reduced symptoms. Clinical examination and ultrasound imaging showed mass reduction of the aneurysm in the postoperative period, which appears to be an evolution hitherto undocumented in the literature. Conclusions: Many treatments are available for Guyon\u2019s canal syndrome. Past medical and surgical treatments, duration and severity of symptoms, causes, and pathogenesis are important for therapeutic choice. Surgical treatment based on ligament section and lysis of the Guyon\u2019s canal downstream, without any action on the aneurysm and with ulnar artery preservation, determined a reduction in terms of volume, relief of the symptoms, and patient satisfaction. With this case we describe a surgical therapeutic option for the treatment of Guyon\u2019s canal syndrome caused by an aneurysm of the ulnar artery, in which surgery is limited to canal decompression and consequential aneurysm mass reduction with concomitant relief of symptoms.<\/jats:p>","DOI":"10.3390\/reports7040101","type":"journal-article","created":{"date-parts":[[2024,11,18]],"date-time":"2024-11-18T04:07:09Z","timestamp":1731902829000},"page":"101","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Spontaneous Postoperative Reduction of Ulnar Aneurysm by Simple Decompression of Guyon\u2019s Canal in a Patient with Hypothenar Hammer Syndrome: A Case Report"],"prefix":"10.3390","volume":"7","author":[{"given":"Ettore","family":"Gasparo","sequence":"first","affiliation":[{"name":"Plastic Surgery and Microsurgery Unit, Department of Surgical Sciences, Faculty of Medicine and Surgery, University Hospital \u201cDuilio Casula\u201d, University of Cagliari, 09124 Cagliari, Italy"},{"name":"Plastic Surgery Unit, Department of Medical, Surgical and Experimental Sciences, Sassari University Hospital Trust, University of Sassari, 07100 Sassari, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adrian","family":"Gustar","sequence":"additional","affiliation":[{"name":"Department of Medical Sciences and Public Health, University of Cagliari, 09042 Monserrato, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matteo","family":"Atzeni","sequence":"additional","affiliation":[{"name":"Plastic Surgery and Microsurgery Unit, Department of Surgical Sciences, Faculty of Medicine and Surgery, University Hospital \u201cDuilio Casula\u201d, University of Cagliari, 09124 Cagliari, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2122-6493","authenticated-orcid":false,"given":"Pietro Luciano","family":"Serra","sequence":"additional","affiliation":[{"name":"Plastic Surgery Unit, Department of Medical, Surgical and Experimental Sciences, Sassari University Hospital Trust, University of Sassari, 07100 Sassari, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7739-9801","authenticated-orcid":false,"given":"Filippo","family":"Boriani","sequence":"additional","affiliation":[{"name":"Plastic Surgery and Microsurgery Unit, Department of Surgical Sciences, Faculty of Medicine and Surgery, University Hospital \u201cDuilio Casula\u201d, University of Cagliari, 09124 Cagliari, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,11,17]]},"reference":[{"key":"ref_1","first-page":"380","article-title":"Hypothenar hammer syndrome","volume":"41","author":"Dreizin","year":"2012","journal-title":"Am. 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Rehabil."}],"container-title":["Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2571-841X\/7\/4\/101\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T16:33:52Z","timestamp":1760114032000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2571-841X\/7\/4\/101"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,11,17]]},"references-count":11,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2024,12]]}},"alternative-id":["reports7040101"],"URL":"https:\/\/doi.org\/10.3390\/reports7040101","relation":{},"ISSN":["2571-841X"],"issn-type":[{"value":"2571-841X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,11,17]]}}}