The Randomised Study of Preoperative Radiotherapy With Consolidating Chemotherapy for Unresectable Rectal Cancer

The Randomised Study of Preoperative Radiotherapy With Consolidating Chemotherapy for Unresectable Rectal Cancer

Short-course Preoperative Radiotherapy With Consolidating Chemotherapy vs. Preoperative Chemoradiation in Patients With Unresectable Rectal Cancer: Phase III Study

Maria Sklodowska-Curie National Research Institute of Oncology, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Cracow, Poznan University of Medical Sciences, Medical University of Lublin

The addition of Oxaliplatin to conventionally fractionated chemoradiation (FULV or capecitabine) is considered as standard in unresectable rectal cancer by the panel of experts. The Investigators addressed the question whether short-course preoperative radiotherapy with consolidating chemotherapy of FOLFOX4 may increase the rate of R0 resection in patients with unresectable rectal cancer.

Patients with unresectable primary rectal cancer or with unresectable local recurrence without distant metastases are randomly allocated to control or experimental arm. The preoperative treatment in the control arm is conventionally fractionated chemoradiation with 50.4 Gy total dose in 28 fractions of 1.8 Gy over 5.5 weeks simultaneously with 5-Fu, leucovorin and oxaliplatin. Experimental group receive 25 Gy in 5 fractions of 5 Gy over 5 days and after one week interval - consolidating chemotherapy of 3 courses of FOLFOX4. Surgery should be curried out 10-11 weeks from beginning of radiation and at least 4 weeks from the last dose of fluorouracil or radiation. The study hypothesis is that the short-course preoperative radiotherapy with consolidating chemotherapy produce at least 10% increase of the rate of R0 resection compared to preoperative chemoradiation.

25 Gy in 5 fractions of 5 Gy over 5 days. One week interval. Consolidating chemotherapy of 3 courses of FOLFOX4. Surgery 10-11 weeks from beginning of radiation and at least 4 weeks from the last dose of fluorouracil.

Conventionally fractionated chemoradiation with 50.4 Gy total dose in 28 fractions of 1.8 Gy over 5.5 weeks. Surgery 10-11 weeks from beginning of radiation and at least 4 weeks from the last dose of radiation.

28 x 1,8 Gy with simultaneous neoadjuvant chemotherapy: two courses of 5-Fu 325 mg/m2/day i.v. bolus and LV 20 mg/m2/day i.v.-bolus over 5 days given during 1-5 and 29-33 days of radiation. Oxaliplatin is given 50 mg/m2 once a week 5 times during 1, 8, 15, 22 and 29 days of radiation.

Inclusion Criteria: Patients with unresectable primary rectal cancer or with unresectable local recurrence without distant metastases. WHO performance status ≤ 2. Lower border of tumour ≤ 15 cm from anal verge. Exclusion Criteria: cardiac coronary arterial disease, arrhythmias, stroke even if they have occurred in the past and are controlled with medication

Bujko K, Kolodziejczyk M. The 5 x 5 Gy with delayed surgery in non-resectable rectal cancer: a new treatment option. Radiother Oncol. 2008 Jun;87(3):311-3. doi: 10.1016/j.radonc.2007.12.020. Epub 2008 Jan 18. No abstract available.

Cisel B, Pietrzak L, Michalski W, Wyrwicz L, Rutkowski A, Kosakowska E, Cencelewicz A, Spalek M, Polkowski W, Jankiewicz M, Stylinski R, Bebenek M, Kapturkiewicz B, Maciejczyk A, Sadowski J, Zygulska J, Zegarski W, Jankowski M, Las-Jankowska M, Toczko Z, Zelazowska-Omiotek U, Kepka L, Socha J, Wasilewska-Tesluk E, Markiewicz W, Kladny J, Majewski A, Kapuscinski W, Suwinski R, Bujko K; Polish Colorectal Study Group. Long-course preoperative chemoradiation versus 5 x 5 Gy and consolidation chemotherapy for clinical T4 and fixed clinical T3 rectal cancer: long-term results of the randomized Polish II study. Ann Oncol. 2019 Aug 1;30(8):1298-1303. doi: 10.1093/annonc/mdz186.

Bujko K, Wyrwicz L, Rutkowski A, Malinowska M, Pietrzak L, Krynski J, Michalski W, Oledzki J, Kusnierz J, Zajac L, Bednarczyk M, Szczepkowski M, Tarnowski W, Kosakowska E, Zwolinski J, Winiarek M, Wisniowska K, Partycki M, Beczkowska K, Polkowski W, Stylinski R, Wierzbicki R, Bury P, Jankiewicz M, Paprota K, Lewicka M, Cisel B, Skorzewska M, Mielko J, Bebenek M, Maciejczyk A, Kapturkiewicz B, Dybko A, Hajac L, Wojnar A, Lesniak T, Zygulska J, Jantner D, Chudyba E, Zegarski W, Las-Jankowska M, Jankowski M, Kolodziejski L, Radkowski A, Zelazowska-Omiotek U, Czeremszynska B, Kepka L, Kolb-Sielecki J, Toczko Z, Fedorowicz Z, Dziki A, Danek A, Nawrocki G, Sopylo R, Markiewicz W, Kedzierawski P, Wydmanski J; Polish Colorectal Study Group. Long-course oxaliplatin-based preoperative chemoradiation versus 5 x 5 Gy and consolidation chemotherapy for cT4 or fixed cT3 rectal cancer: results of a randomized phase III study. Ann Oncol. 2016 May;27(5):834-42. doi: 10.1093/annonc/mdw062. Epub 2016 Feb 15.