The risk of recurrence after GIST surgery is real, and the most common sites of metastasis are the peritoneum and liver. Assessment of the risk of recurrence helps to establish a schedule for routine follow-up. High-risk patients may recur within 2-3 years after surgery, while low-risk patients may recur much later. Enhanced CT scan of the abdomen is recommended as a routine follow-up. a. For intermediate and high-risk patients, abdominal CT scans should be performed every 3-4 months for 3 years, then every 6 months until 5 years b. For low-risk patients, abdominal CT scans should be performed every 6 months for 5 years For patients with metastatic recurrence under treatment, tumor response and disease progression should be closely monitored. A reasonable follow-up schedule is recommended as follows: 1. Baseline enhanced CT data must be available before treatment as a basis for efficacy assessment 2. Enhanced CT scan or MRI follow-up should be done at least every three months after starting treatment 3. Close monitoring in the first three months of treatment is very important. PET-CT should be done when necessary to confirm the tumor response to treatment.