Macroscopic and Microscopic Mismatch in Ulnar Nerve Tumours: A Case Report

ackground: Neurological symptoms, particularly pain, resulting from ulnar nerve tumors can be severelydebilitating. Accurate diagnosis and appropriate management of these tumors are crucial, as discrepancies betweenmacroscopic and microscopic findings can significantly impact therapeutic decisions and patient outcomes.Case Description: A 65-year-old man presented with a lump on his left elbow, first noted in March 2024. Initialpathological analysis suggested a neurofibroma; however, following surgical intervention, the patient developednew symptoms, including pain and weakness in the left hand. MRI scans subsequently diagnosed a schwannomaof the ulnar nerve. A second tumor excision was performed, leading to microscopic confirmation of a neuroma.Post-surgery, the patient experienced gradual relief from his neurological complaints. This case highlights a strikingdiscrepancy between macroscopic and microscopic findings, initially leading to a misdiagnosis of neurofibroma,which was later corrected to neuroma. It emphasizes the importance of comprehensive evaluation methods,including MRI, to achieve an accurate diagnosis that informs appropriate treatment strategies. A multidisciplinaryapproach is essential for optimizing patient outcomes.