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Fig 2. Left internal carotid artery angiogram. Early arterial phase oblique projection (A) shows filling of vascular channel serpentine aneurysm arising from upper trunk of the left middle cerebral artery (MCA). Midarterial phase Towne projection (B) and late-arterial-phase oblique projection (C) show the whole tortuous vascular channel of the serpentine aneurysm. Note the extremely slow flow and the filling of normal cortical branches of distal parietal arteries. Schematic drawing (D) illustrates the giant serpentine aneurysm (GSA) that corresponds to the angiograms.
