[Internal carotid occlusion and essential thrombocythemia. 2 cases].

We report 2 cases of occlusion of the internal carotid artery in young, non-atherosclerotic patients with essential thrombocythemia (ET). This complication of ET seems to be rare, but is probably underdiagnosed since transient ischemia, which is frequent in ET patients, is seldom explored by angiography. The excess of thrombocytes and the thrombopathy may account for the microvascular complications, but in the absence of any other contributory factor, occlusions of large arteries, such as the ICA, is more difficult to explain.