Pathological local expansion of the lumen of the artery of the brain, the gap which is the most common cause of non-traumatic intracerebral hemorrhage. Tracheal aneurysm of the internal carotid artery. Marked tortuosity of the C1 segment of the right inner carotid with the formation of inflection at an acute angle. Marked looping C1 segment of the left ICA. The diagnosis is kicking of the right ICA. Coiling left ICA.