Pitfall of isolated superior mesenteric artery dissection with normal D-dimer level.

A 51-year-old man with untreated hypertension developed sudden-onset epigastric pain. Despite a normal D-dimer level, abdominal contrast-enhanced computed tomography revealed superior mesenteric artery dissection. Abdominal contrast-enhanced computed tomography is mandatory when examining patients with sudden-onset abdominal pain, even those with a normal D-dimer level.