In general, postoperative review of common tumors of the urinary system (kidney cancer, pyel cancer, bladder cancer, etc.) can be done at the following intervals: 1. About one month after surgery, a review is needed, which mainly depends on the overall recovery of the patient after surgery and wound healing, and depending on the condition, an ultrasound examination may be required. 2.Within 2 years after surgery, a review is usually needed once every 3 months, depending on the condition, ultrasound, chest X-ray, CT, cystoscopy and other examination items need to be checked. 3.During the period of 2-5 years after surgery, generally about once every six months 4.After 5 years after surgery, if there are no special circumstances, a review can be done once a year.