[Diagnosis of aortic arch thrombosis by two-dimensional echocardiography from the jugular fossa in a patient with protein C deficiency].

We describe the case of a 63-year-old man who suffered concomitant cerebral, mesenteric, and renal infarctions. Idiopathic dilated myocardiopathy without intracardiac masses was diagnosed by transthoracic echocardiography. A cross-sectional view of the innominate artery from the jugular fossa notch position revealed a threatening thrombus in the proximal region of the aortic arch. Severe functional protein C deficiency was diagnosed by hematologic study.