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What this study adds to the existing literature and how it will influence future clinical practice 22The aim of this study was to determine outcomes in patients undergoing abdominal aortic aneurysm 23 (AAA) repair [endovascular (EVAR) or open] who have a synchronous malignancy. Synchronous intra-24 abdominal cancer is relatively common in patients undergoing AAA-repair and surgeons are faced with 25the dilemmas of what type of repair to offer and in what sequence. Our findings support that EVAR is 26 superior regarding short-term mortality. Both EVAR and OAR were associated with significant short-27 term morbidity, which merits careful planning and close follow-up in this patient group. Future studies 28should look into the optimal timing of AAA-repair, for which limited data exist. analysis was applied to assess mortality and major-morbidity at 30-days and long-term. 51 Results:The literature review identified 36 series (543 patients) and the majority (18 series) reported 52 on patients with colorectal-malignancy and AAA. Mean weighted-mortality for OAR at 30-days was 53 11% [95% Confidence Interval (CI): 6.6% to 17.9%]; none of the EVAR patients died peri-operatively. 54The weighted 30-day major complication-rate for EVAR was 20.4% (10.0% to 37.4%) and for OAR it 55 was 15.4% (7.0% to 30.8%). Most patients had their AAA and malignancy treated non-simultaneously 56 (56.6%, 95% CI: 42.1% to 70.1%). In the EVAR cohort 3 patients (4.6%) died at last follow up (range 57 24 to 64 months). In the OAR cohort 23 (10.6%) had died at last follow up (range from 4 to 73 months). 58 Conclusion:In this meta-analysis, OAR was associated with significant peri-operative mortality in 59 patients with an IAM. EVAR should be the first line modality of AAA repair. The majority of patients 60were not treated simultaneously for the two pathologies, but further investigation is necessary to define 61 the optimal timing for each procedure and malignancy. 62

In obese patients, subjected to laparoscopic bariatric surgery in reverse trendelenburg position, adjustment of ventilation strategies and hemodynamic optimization succeeded to improve rScO.