This is a prospective, multi-center, single arm, phase II study. In this study, the low-dose initial dose incremental optimization scheme was used in the first cycle in patients ≥65 years old who need to receive fruquintinib. The aim is to observe the safety, tolerability and efficacy of fruquintinib in elderly patients with mCRC refractory to standard treatment. The correlation between the efficacy, toxicity and geriatric evaluation of fruquintinib will also be analysed.
