Small saphenous vein aneurysm at the distal ankle: a case report

Background Small saphenous vein aneurysm distal to the ankle joint is extremely rare, in clinical practice. This case may serve as a clinical reference for the diagnosis and treatment of similar rare cases. Case presentation This article reports a case of small saphenous vein aneurysm distal to the ankle. A painless mass was palpable over the patient’s left lateral malleolus, and Doppler ultrasonography revealed focal aneurysmal dilatation of the distal small saphenous vein. A preliminary diagnosis of distal small saphenous vein aneurysm was made, and complete surgical excision of the aneurysmal sac was performed. The patient recovered well postoperatively, with no adverse complications observed during the follow-up period. Conclusion For superficial masses around the ankle, venous ultrasound should be included in differential examinations to rule out venous aneurysms.