"Most patients with IMA aneurysms are asymptomatic, and these aneurysms are usually discovered incidentally 3-6. Some patients may present with a palpable pulsatile abdominal mass or bruit around the umbilicus 3,6. In cases complicated by rupture, the patient may present with abdominal pain, low back pain, collapse or haemorrhagic shock 3."
"IMA aneurysms are best visualised by arterial imaging like CT angiography (CTA), MR angiography (MRA) and digital subtraction angiography (DSA). These aneurysms can be saccular or fusiform (commonly pear-shaped) in morphology. Associated stenosis or occlusion of the coeliac artery and SMA as well as the collateral vessels (e.g. arc of Riolan and marginal artery of Drummond) can also be demonstrated."