Outcomes of elective abdominal aortic aneurysm repair in the setting of malignancy.

Abstract

Elective abdominal aortic aneurysm (AAA) repair for patients with a diagnosis of cancer has remained controversial. In the present study, we evaluated the in-hospital outcomes for patients who had undergone AAA repair in the setting of a cancer diagnosis. Inpatients (2008-2018) who had undergone elective AAA repair were selected from the Cerner Health Facts database using International Classification of Diseases, ninth and tenth revision, procedure codes. We used χ² analysis and logistic regression models to evaluate the association of patient characteristics with the medical and vascular outcomes. A total of 8663 patients who had undergone AAA repair were identified (270 with a cancer diagnosis and 8393 without a cancer diagnosis). No significant demographic differences were found between the two groups, except that more patients with a cancer diagnosis had undergone endovascular aneurysm repair (EVAR) than open aneurysm repair (88.2% vs 82.1%; P = .01). Male reproductive organ (24.8%) and lung (24.4%) cancer were the most common cancer diagnoses in the cohort. The unadjusted analysis revealed that patients with a cancer diagnosis were more likely to require remedial EVAR (relative risk, 3.47; 95% confidence interval [CI], 1.18-10.2) or reoperation for bleeding, infection, or thrombosis (relative risk, 1.59; 95% CI, 1.09-2.32). Multivariable analysis demonstrated that, overall, patients with a cancer diagnosis were more likely to require a prolonged length of stay (odds ratio [OR], 2.2; 95% CI, 1.5-3.3) and to have developed respiratory failure (OR, 2.1; 95% CI, 1.3-3.4) or infection (OR, 1.7; 95% CI, 1.2-2.4). Similar point estimates were found for men with and without a cancer diagnosis. However, women with a cancer diagnosis had a greater odds of a prolonged length of stay compared with women without a cancer diagnosis (OR, 2.6; 95% CI, 1.2-5.6). EVAR in the presence of a cancer diagnosis was also significantly associated with poor outcomes. Elective AAA repair for patients with a cancer diagnosis was associated with a prolonged length of stay and the development of infection, respiratory failure, and vascular-specific complications during the inpatient hospitalization. Given that differences in outcomes stratified by gender and treatment modality have been shown for patients with a cancer diagnosis, careful patient selection is important and reinforces the finding that cancer exerts negative systemic postoperative effects even when treated or quiescent.