Should Surgical Treatment Be Provided to Patients with Colorectal Cancer Who Are Aged 90 Years or Older?

Purpose The number of patients aged ≥ 90 years is increasing worldwide; however, the treatment guidelines for colorectal cancer in elderly patients remain unclear. This study aimed to investigate the clinical outcomes of patients with primary colorectal cancer aged ≥ 90 years. Methods We retrospectively reviewed the medical records of 100 patients (aged ≥ 90 years) with primary colorectal adenocarcinoma. Their demographic and clinical characteristics and surgical outcomes were assessed. Results The patients who underwent tumor resections ( n = 71) showed longer overall and cancer-specific survival than those who underwent non-operative treatments ( n = 29) (median overall survival time: 23.92 months vs. 2.99 months, P