LAUSR

Background The use of surgery in patients with colorectal cancer (CRC) aged ≥90 years remains controversial. This study aimed to evaluate the short-term postoperative and long-term oncologic outcomes of CRC surgery in patients within this age group. Methods A total of 151 consecutive nonagenarian patients who underwent CRC surgery were included from 3 different hospitals. The Comprehensive Complication Index (CCI) was used to grade postoperative complications. Univariate and multivariate analyses were conducted to identify factors associated with CCI and overall survival (OS). Results The patients had a mean age of 92.8 years (standard deviation ±1.9 years). Forty-six patients (30.5%) underwent emergency surgery, and 105 patients (69.5%) underwent elective surgery. The postoperative complications rate was 66.2% (100/151), and the mean CCI was 26.3 (±30.8). Twenty-three patients (15.2%) died postoperatively, and the perioperative mortality rates for elective surgery and emergency surgery were 7.6% (8/105) and 32.6% (15/46), respectively (P<0.001). The 1-, 3-, and 5-year survival rates were 77.5%, 53.9%, and 38.6%, respectively. Multivariate analysis revealed emergency surgery and American Society of Anesthesiologists (ASA) score to be predictors of postoperative complications. Advanced tumor stage, palliative surgery, ASA score ≥4, and CCI >17 were associated with poor OS. Conclusions CRC surgery should not be denied to nonagenarian patients. Surgical treatment can be performed with acceptable morbidity and mortality, and achieves long-term survival in a select group.