ABSTRACT
A case of embolic episode resulting in cerebral infarction from an unknown source is reported. This occured in a young male. He had no cardiovascular risk factors. Diagnostic evaluation for identifying the source of embolism revealed a large, pedunculated and mobile thrombus arising from a nonaneurysmatic and nonatheroslerotic descending aorta. The thrombus was identified by transesophageal echocardiography, and was successfully removed by aortic thromboendarterectomy. We emphasize the importnace of transesophageal echocardiography as a reliable method for the diagnosis of thoracic aorta diseases and for identification of aortic thrombi. An aggressive surgical approach is recommended in the low-risk parient to prevent further embolic episodes.