Management strategy for spontaneous isolated dissection of the superior mesenteric artery based on morphologic classification.

Objective: To explore a therapy strategy for the spontaneous isolated dissection of the superior mesenteric artery (SIDSMA) based on morphologic classification.

Methods: Forty-two symptomatic patients with SIDSMA presenting with abdominal pain between January 2007 and December 2012 were enrolled in this retrospective study. We proposed a new morphologic classification with subtypes depending on the patency of the true lumen and reviewed the patients' clinical features, risk factors, computed tomography images (morphologic classification, location of entry site, dissection length, and true lumen residual diameter), treatment modalities, and follow-up results.