Abstract
Superior mesenteric artery (SMA) aneurysm is the third most common splanchnic artery aneurysm. Unlike other splanchnic artery aneurysm, isolated aneurysms of the SMA branches are rare. They are usually asymptomatic and difficult to detect until they rupture and cause abdominal pain and hypovolemic shock. Thus, most cases are diagnosed after the occurrence of complications. In this report, we described a 76-year-old woman who had two saccular aneurysms in the superior mesenteric arterial branch(es). One of them was ruptured and partly thrombosed. The patient had acute renal failure secondary to massive intraabdominal hemorrhage.
Highlights
Superior mesenteric artery (SMA) aneurysm is the third most common splanchnic artery aneurysm
After hemodynamic and clinical stabilisation, CT angiography and MR imaging with contrast was performed and demonstrated two saccular aneurysms arising from anterior side branche of the SMA adjacent to the transverse colon and that a collection compatible with hematoma contrasted circumferential wall but no in central zone (Fig. 2, 3, 4)
T1-weighted contrast enhanced fat-suppressed axial plane (B) shows two saccular aneurrrsyms arising from side branches of the SMA adjacent to posterior side of the transverse colon and containing dense and homogen contrast material in the lumen like abdominal aorta
Summary
Superior mesenteric artery (SMA) aneurysm is the third most common splanchnic artery aneurysm. Unlike other splanchnic artery aneurysm, isolated aneurysms of the SMA branches are rare. They are usually asymptomatic and difficult to detect until they rupture and cause abdominal pain and hypovolemic shock. Most cases are diagnosed after the occurrence of complications [2] The aim of this case report was to describe the imaging features of two saccular superior mesenteric artery aneurysms that one of them thrombosed and ruptured and created acute renal failure secondary to a giant abdominal hematoma
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