The specific recurrence time of retroperitoneal tumors is mainly related to the benign and malignant nature of the tumor. Generally, benign tumors will not recur, and malignant tumors may recur about 3 to 5 years after surgery. There are benign and malignant retroperitoneal tumors, which need to be surgically resected and the tumor type clarified through pathological examination. If it is benign retroperitoneal tumor, the tumor tissue will be removed cleanly through surgery, and it can be cured, usually will not recur, and regular recheck can be done. If it is a malignant retroperitoneal tumor, after surgical resection, it has to be supplemented with chemotherapy, radiotherapy and other treatments, and may recur about 3~5 years after surgery. If the examination found retroperitoneal tumor, it is recommended to cooperate with professional oncologists for treatment as soon as possible, and make the next treatment plan according to the specific situation in time after the operation, so as to reduce the possibility of recurrence of retroperitoneal tumor as much as possible.