ACUTE MEDIAN NERVE COMPRESSION AT THE DISTAL FOREARM CAUSED BY A THROMBOSED ANEURYSM OF AN EPINEURAL VESSEL - CASE-REPORT

THE CASE OF a patient with a 2-day history of symptoms suggesting acut e carpal tunnel syndrome is presented. However, an urgent electroneuro graphic examination revealed median nerve compression at the forearm a nd magnetic resonance imaging confirmed compression by a mass proximal to the carpal tunnel. Surgical exploration showed a recently thrombos ed aneurysm of an epineural vessel. Histological and, later, general a nd angiological investigations could not reveal the underlying cause o f this aneurysm. Preoperative electrodiagnostic examination is recomme nded in acute peripheral nerve compression to prevent decompression at an incorrect site. If atypical nerve compression is suspected, magnet ic resonance imaging may be indicated to detect localized nerve compre ssion and its underlying cause.