Diagnostic and Surgical Challenges in Extradigital Glomus Tumour: A Case Report

Glomus tumours are benign neoplasms with classical presentations of cold intolerance, severe pain, and tenderness, primarily in subungual locations. However, these hallmark symptoms may not always manifest in extradigital sites, complicating the diagnostic process. This case report presents a patient with a 7-year history of debilitating pain due to a glomus tumour located in the right upper arm. Key clinical findings included persistent, unexplained pain without classic glomus symptoms. This case report highlights the importance of recognising atypical presentations of glomus tumours and the pivotal role of MRI in diagnosis. Optimal diagnostic outcomes are achieved when MRI is performed with a well-informed clinical background and close coordination between the patient, surgeon, and radiologist. Precise anatomical localisation, achieved through careful site marking, along with a reduced field of view in imaging, enhances lesion detection and further aids in minimising intraoperative challenges. This approach ensures more accurate diagnoses and improves surgical outcomes in cases where classical symptoms are absent.