Venous aneurysms of the wrist.

We describe 2 cases of primary atraumatic venous aneurysm affecting the wrist. Both aneurysms were in branches of the cephalic vein in close proximity to the radial artery. The definitive treatment for these venous aneurysms was surgical excision. There was no recurrence after 9 years in case 1 and after 11 years in case 2. Modern diagnostic modalities were used, including physical examination, Doppler ultrasonography, aspiration, magnetic resonance imaging, and venography. The pathologic analysis was consistent with those venous aneurysms reported in other parts of the body. The hand surgeon should be aware of this rare condition when formulating a differential diagnosis for soft tissue masses of the wrist.