Guyon Canal Syndrome Due to Schwannomas of Zone 3 Ulnar Nerve without Neurologic Symptoms: A Case Report

Document Type : CASE REPORT


Joint Reconstruction Research Center, Tehran University of Medical Sciences, Tehran, Iran


We report a mass without neurologic findings and moderate pain in a 33-year-old male’s wrist at the 3rd zone of the
ulnar nerve due to schwannoma that was excised successfully, and the patient was free of symptoms. We further
discuss the prevalence and management of this lesion.
Level of evidence: V


1. Kalisman M, Laborde K, Wolff TW. Ulnar nerve
compression secondary to ulnar artery false
aneurysm at the Guyon’s canal. Journal of Hand
Surgery. 1982;7(2):137-9.
2. Zahrawi F. Acute compression ulnar neuropathy at
Guyon’s canal resulting from lipoma. Journal of Hand
Surgery. 1984;9(2):238-40.
3. Cobb TK, Carmichael SW, Cooney WP. Guyon’s canal
revisited: an anatomic study of the carpal ulnar
neurovascular space. The Journal of hand surgery.
4. Aguiar PH, Bor-Seng-Shu E, Gomes-Pinto F, Almeida-
Leme RJd, Freitas ABR, Martins RS, et al. Surgical
management of Guyon’s canal syndrome, an ulnar
nerve entrapment at the wrist: report of two cases.
Arquivos de neuro-psiquiatria. 2001;59(1):106-11.
5. Kwak K-W, Kim M-S, Chang C-H, Kim S-H. Ulnar nerve
compression in Guyon’s canal by ganglion cyst. Journal
of Korean Neurosurgical Society. 2011;49(2):139.
6. Okamoto H, Kawai K, Hattori S, Ogawa T, Kubota Y,
Moriya H, et al. Thoracic outlet syndrome combined
with carpal tunnel syndrome and Guyon canal
syndrome in a child. Journal of Orthopaedic Science.