The case of a 58 year old patient with acute arterial occlusions of both lower limbs is presented. Bilateral embolectomy (Fogarthy's catheter) was performed immediately, followed by attempts to discover the source of potential emboli. Transoesophageal echocardiography (TEE) detected extensive thrombosis of the descending aorta. Its peripheral tail was considered malignant. The finding was confirmed by computer tomography examination (CT angiography). A decision was made, taken together with the patient, to administer the conservative anticoagulant treatment. Both diagnostic imaging techniques were repeated after four months and their results indicated almost complete regression of the originál aortic thrombosis with no other embolie events. This uncommon and remarkable čase emphasizes the substantial role of TEE in the diagnosis of potential embolie sources.

        Key words: Aortic thrombosis, arterial embolisation, transoesophageal echocardiography.