Aneurysm of the pulmonary vein: an unusual cause of stroke.

This clinical report deals with a giant true pulmonary venous aneurysm, which was partially thrombosed. The overall incidence of pulmonary venous aneurysms is unknown, and they are reported only occasionally. We present the case of a previously healthy man with acute onset of ischemic cerebral stroke. The cause was a thrombus in a huge aneurysm of the left superior pulmonary vein. The patient subsequently underwent uncomplicated therapy for stroke, including thrombolysis followed by excision of the giant pulmonary venous aneurysm. As curative therapy we recommend complete resection of this rare entity.