Laparoscopic retroperitoneal lymph node dissection is one of the most challenging surgical procedures in surgical oncology. Laparoscopy requires clearer field, less patient bleeding, less interference with other organs in the abdominal cavity, less patient pain and faster recovery Features of laparoscopic modified retroperitoneal lymph node dissection for testicular cancer: the efficacy is the same as that of open surgery, and laparoscopic surgery has the absolute advantages of less trauma, faster patient recovery after surgery and beautiful incision After laparoscopic retroperitoneal lymph node dissection for left testicular tumor