String sign in angiography is suggestive of:
Aerial dissection
Aoa aneurysm
Stroke
None of the above
Traditional angiography remains the basis of diagnosis and characterization of aerial dissection. Angiographic abnormalities include stenosis of the true lumen, or "string-sign," visible intimal flaps, and the appearance of contrast in the false lumen. Four-vessel cerebral angiography should be performed when suspicion of dissection exists. Ref: Schwaz's principle of surgery 9th edition, chapter 42.