“…After the surgical cytoreduction, the size of residual disease was usually expressed as R1, meaning no macroscopic residual disease, R2a, meaning macroscopic residual disease less than 2.5 or 5 mm, or R2b, meaning macroscopic residual disease more than 2.5 or 5 mm in diameter. When reported, median survival following complete R1 resection of all macroscopic disease varied from 17.8 months to 39.0 months, 52,54,57,60,65,66 whereas the reported 5-year survival rates varied from 20% to 54%. 49,52,57,66 Median survival after incomplete R2a resection resulted in median survival times of 12.5 months to 24 months, 36,52,54,57,60,66 with 5-year survival rates of between 10% and 29%.…”