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An internal carotid artery aneurysm with a small neck remnant identified by DSA and CE-MRA but not visible on TOF-MRA. A, B: CE-MRA, with volume-rendered reconstruction of the internal carotid artery, showing a small aneurismal neck remnant (arrow). C, D: TOF-MRA, with volume-rendered reconstruction of the internal carotid artery, without clear identification of the aneurismal neck.
