A Two Stage Open and Interventional Therapeutic Approach for an Inferior Pancreaticoduodenal Artery Aneurysm With Coeliac Artery Occlusion.

Introduction: Visceral artery aneurysms (VAAs) are rare but have a high mortality rate in cases of rupture, especially for pancreaticoduodenal artery aneurysms (PDAAs). A hybrid approach is presented for a challenging case with inferior PDAA (iPDAA) with concomitant coeliac artery (CA) occlusion and a variant arterial supply to the liver.

Report: A 61 year old patient complained of postprandial pain associated with elevated liver enzymes and impaired hepatic synthesis capacity. The left hepatic artery (LHA) originated from an occluded CA, whereas the right hepatic artery (RHA) originated directly from the superior mesenteric artery (SMA) proximal to the iPDAA. Due to the anatomical variant, an endovascular only approach via iPDAA embolisation could have posed a critical risk to the arterial supply of the liver. Therefore, the initial plan was to first secure liver perfusion via endovascular revascularisation of the CA, before conducting a coil embolisation of the iPDAA. However, endovascular CA revascularisation failed due to a complete and fixed occlusion. As an alternative therapeutic approach, open surgical aorto-visceral autologous bypass ensured arterial supply of the liver, which now enabled safe exclusion of the iPDAA via interventional coil embolisation. This two stage hybrid strategy resulted in iPDAA exclusion and was followed by symptom relief and normalised hepatic synthesis capacity.

Discussion: This case demonstrates the continued need for open visceral bypass surgery to ensure organ perfusion, if the latter depends on an aneurysmal artery. In such a situation, visceral bypass surgery can be considered in challenging anatomical scenarios, which demonstrates the relevance of endovascular and open procedures. In conclusion, both procedures can be combined in individualised therapy approaches to maximise patient benefit.