Fig. 3. Type I: patent false lumen with both entry and re-entry; Type II: ‘cul-de-sac’-shaped false lumen without re-entry; Type III: thrombosed false lumen with an ulcer-like projection; Type IV: completely thrombosed false lumen with no ulcer-like projection; Type V: aneurismal dissection with stenosis of the distal part of the SMA; Type VI: total (VIa) or partial (VIb) thrombosis of the SMA. SMA: superior mesenteric artery.