Arteriovenous malformation hemangioma of the ulnar artery: A case report highlighting challenges in diagnosis and surgical management.

Background: Arteriovenous malformation hemangioma (AVMH) is a rare, benign vascular lesion, often located in the head and neck and less frequently in the limbs. Early symptoms are typically nonspecific, making the clinical differential diagnosis with other benign lesions, such as schwannomas, particularly challenging.

Case description: We report the case of a 25-year-old male presenting with a lesion in the forearm. Initially, the clinical and imaging features suggested a schwannoma, due to its location along a peripheral nerve and the absence of distinctive vascular signs. The lesion was surgically excised. Histopathological examination revealed features consistent with AVMH, confirming the diagnosis.

Conclusion: This case underscores the importance of including AVMH in the differential diagnosis of soft tissue lesions, especially when located along the course of a peripheral nerve and mimicking other benign tumors such as schwannomas.