“…With respect to the recurrence of bladder tumors, which has been reported to appear in about 20-40% of cases [1,4,5], it remains unclear whether the high pressures used in laparoscopic surgery contribute to the flow of cancer cells into the lower urinary tract resulting in bladder recurrence [7][8][9][10][11][12][13]. Thus far, several risk factors such as tumor multiplicity and low pT stage have been reported [14,15], but these results were based on the data obtained by open surgery.…”