Triplet Combination or Doublet Regimen Versus Chemoradiation as Neoadjuvant Therapy for Locally Advanced Rectal Cancer

Fluorouracil 225 mg/m2/day continuous intravenous infusion on weekdays for five weeks; local irradiation 2GY/day on weekdays, totally 50GY.

Oxaliplatin 85 mg/m2 on day 1; irinotecan 150 mg/m2 on day 1; leucovorin 400 mg/m2 on day 1; fluorouracil 2400 mg/m2 civ over 46h; treatment will be repeated every 14 days; prophylactic G-CSF support is recommended.

Oxaliplatin 85 mg/m2 on day 1; leucovorin 400 mg/m2 on day 1; fluorouracil 400 mg/m2 bolus and 2400 mg/m2 civ over 46h; treatment will be repeated every 14 days.