- After surgery a CAT scan of chest, abdomen and pelvis will be performed every 3 months for 2 years then every 6 months for 3 years. An EGD (upper endoscopy) with biopsy will be done every 6 months for 2 years and then yearly for 3 years. Physical exam, vital signs and routine blood tests will be done every 2 weeks for 6 months, then every 3 months for 1.5 years, and then every 6 months for 3 years.