Hemangioma in the Third Interdigital Space of the Hand Extending to the Fourth Finger: Surgical Management of a Rare Location.

Vascular tumors are uncommon benign soft tissue lesions of the hand and rarely occur within the interdigital web spaces. We report the case of a 57-year-old man who presented with a progressively enlarging painful mass in the third interdigital space of the left hand. Clinical examination revealed a soft, slightly compressible lesion measuring approximately 3 cm, associated with discomfort during grasping activities. Magnetic resonance imaging demonstrated a well-defined, highly vascularized mass extending toward the fourth finger, showing intense contrast enhancement without evidence of bone or tendon invasion. Complete surgical excision was performed through a palmar approach using meticulous dissection to preserve the adjacent neurovascular structures while controlling the feeding vessels. Histopathological analysis confirmed the diagnosis of a cavernous hemangioma with clear surgical margins. The postoperative course was uneventful, with complete recovery of hand function and no evidence of recurrence at six months of follow-up. This case highlights the diagnostic value of magnetic resonance imaging in the evaluation of vascular tumors of the hand and emphasizes the importance of careful surgical planning in anatomically complex regions. Complete excision remains the treatment of choice, providing definitive diagnosis, symptom relief, and excellent functional outcomes. Reporting such rare localizations contributes to improved recognition and management of hemangioma arising within the interdigital spaces of the hand.