“…2,[10][11][12][13][14][15] CAL after esophagectomy is associated with high postoperative mortality. 2,4) Previous studies have identified various risk factors for CAL, such as neoadjuvant chemotherapy, 4,15,16) chronic obstructive pulmonary disease (COPD), 2) smoker at diagnosis, 6) pneumonia, 17,18) calcification of arteries, 9,19) diabetes mellitus, 2,6,20) body mass index (BMI), 1) and arrhythmia. 2,6,19,21) Some risk factors still remained controversial and so accurate prediction of risk groups for CAL remained very difficult.…”