Kärkkäinen JM, Oderich GS, Tenorio ER, et al. - Researchers investigated the predictive value psoas muscle area and attenuation (radiodensity), quantified by computed tomography, together with clinical risk assessment for outcomes after fenestrated and branched endovascular aortic repair (FBEVAR). In this single-center study of 504 patients undergoing elective FBEVAR for pararenal or thoracoabdominal aortic aneurysm (TAAA), they observed 30-day mortality, 90-day mortality and major adverse events (MAEs) rates of 2.0%, 5.6% and 20%, respectively. Observations revealed lean psoas muscle area (LPMA, cm ²HU) to be a strong and the only independent predictor of both mortality and MAEs after FBEVAR. They indicated protective effect of high muscle mass against complications regardless of ASA score. A possible utility of the risk stratification based on ASA score and LPMA was suggested for detection of patients at excessively high operative risk.