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Association of Abdominal Aortic Aneurysm and Simple Renal Cysts: a Systematic Review and Meta-analysis.

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BACKGROUND-OBJECTIVE Prior studies have suggested a higher prevalence of simple renal cysts (SRC) among patients with aortic disease, including abdominal aortic aneurysms (AAA). Thus, the aim of this study was… Click to show full abstract

BACKGROUND-OBJECTIVE Prior studies have suggested a higher prevalence of simple renal cysts (SRC) among patients with aortic disease, including abdominal aortic aneurysms (AAA). Thus, the aim of this study was to systematically review all currently available literature and investigate whether patients with AAA are more likely to have SRC. METHODS This study was performed according to the PRISMA guidelines. A meta-analysis was conducted with the use of random effects modeling and the I-square was used to assess heterogeneity. Odds ratios (OR) and the corresponding 95% confidence intervals (CI) were synthesized to compare the prevalence of several patients' characteristics between AAA vs no-AAA cases. RESULTS Eleven retrospective studies, nine comparative (AAA vs no-AAA groups) and three single-arm (AAA group), were included in this meta-analysis, enrolling patients (AAA: N=2,297 vs no-AAA: N=35,873) who underwent computed tomography angiography (CTA) as part of screening or preoperative evaluation for reasons other than AAA. The cumulative incidence of SRC among patients with AAA and no-AAA was 55% (95% CI: 49%-61%) and 32% (95% CI: 22%-42%) respectively, with a statistically higher odds of SRC among patients with AAA (OR: 3.02; 95% CI: 2.01-4.56; p<0.001). The difference in SRC prevalence remained statistically significant in a sensitivity analysis, after excluding the study with the largest sample size (OR: 2.71; 95% CI: 1.91-3.84; p<0.001). CONCLUSIONS Our meta-analysis demonstrated a 3-fold increased prevalence of SRC in patients with AAA compared to no-AAA cases, indicating that the pathogenic processes underlying SRC and AAA could share a common pathophysiologic mechanism. Thus, patients with SRC could be considered at high risk for AAA formation, potentially warranting an earlier AAA screening.

Keywords: analysis; patients aaa; src; simple renal; meta analysis

Journal Title: Annals of vascular surgery
Year Published: 2021

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