Introduction: Complications originating from the aortic conduit after intestinal transplantation (ITx) are currently not well described in the literature. The aim of this study was therefore to report a single center experience with diagnosis and management of complications affecting the donor aortic conduit after ITx with liver containing grafts. Methods: From 1998 to 2018, 35 ITx were performed in Gothenburg, Sweden. 29 of 35 grafts were liver containing intestinal allografts supplied by an aortic conduit (figure 1). The recipients were 24 adults (median age 38 years, range 16 – 66 years) and 5 children (median age 8 years, range 3– 10 years). The aortic conduit was anastomosed to either the aorta (n=20) or the iliac artery (n=9). The most common underlying conditions were intestinal failure (n=18) and non-resectable neuroendocrine pancreatic malignancies with liver metastases (n=6). Immunosuppression consisted primarily of ATG induction, tacrolimus and steroid bolus and tapering. Median donor age was 23 years (range 2–56 years) and median cold ischemic time was 443 min (range 90 - 873 min). Results: Four patients (4/29, 14%) presented with some type of complication originating from the aortic conduit requiring intervention (figure 2). The complications were: stenosis at the origin of the superior mesenteric artery (SMA) branch (n=1), acute bleeding caused by bacterial and fungal arteritis of the conduit (n=1), stenosis of the conduit caused by kinking of the conduit close to the aortic anastomosis (n=1), inflammatory aneurysm of the donor conduit, affecting the origins of the coeliac trunk and the SMA (n=1). The complications were diagnosed from months up to several years after ITx. Discussion In our experience, complications affecting the donor aortic conduit after ITx may present in the early or late post-transplantation period. The insidious clinical presentation and the relatively high prevalence (14%) may warrant specific post-transplantation surveillance of the donor aortic conduit. A timely multidisciplinary therapeutic approach involving interventional radiology was crucial. Figure 1. Donor aortic conduit anastomosed to the recipient aorta Figure 2. Complications affecting the donor conduit of 29 ITx with liver containing grafts
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