Spontaneous superior mesenteric vein tear.

Non-traumatic injury of the superior mesenteric vein (SMV) is extremely rare. Hemoperitoneum from blunt abdominal trauma has been well documented in the literature; however, hemorrhage from a ruptured SMV has been rarely reported. A few cases describing non-traumatic rupture of the SMV are secondary to patients with underlying conditions such as portal hypertension, hepatic cirrhosis and acute pancreatitis. However, our patient did not express any of these findings. We present a case of spontaneous SMV tear in a patient who presented with a one-day history of abdominal pain with no underlying comorbidities or history of trauma.