Currently the 3-year disease free survival of patients with locally advanced rectal cancer is about 50%. Current standard treatment for patients at high risk of failing locally and/or systemically includes pre-operative long course radiotherapy (5 weeks) in combination with chemotherapy (so called neoadjuvant chemoradiotherapy). The neoadjuvant chemoradiotherapy has been demonstrated to improve local control, but had no effect on the overall survival. Different studies in patients with rectal cancer studying the effect of adjuvant post operative chemotherapy did not result in an improved survival. This may be due the fact that rectal cancer surgery (TME) is associated with a high complication rate so substantial proportion of patients cannot receive chemotherapy postoperatively. An alternative approach is to administer the systemic therapy preoperative. To guarantee control of the rectum tumor short-course radiotherapy (5 days) is given, as different studies showed local control of the tumor for a long time. During this waiting period the patient is in a good condition to receive an optimal dose of chemotherapy. The investigators hypothesize that with this proposed protocol both the local tumour and possible micrometastases are effectively treated and that this will result in an increased survival. The investigators will compare this with the standard treatment of neoadjuvant chemoradiation followed by TME surgery and optional adjuvant chemotherapy.
Patients will be randomized between an experimental group (arm B) in which short course 5 x 5 Gy radiation scheme is followed by six cycles of combination chemotherapy (capecitabine/ 5-fluorouracil and oxaliplatin) and surgery and a control group (arm A) with long course chemoradiotherapy followed by surgery. In arm A adjuvant chemotherapy is allowed according to the local protocol of the institution. In both groups the rectal tumour will be removed by TME surgery or more extensive surgery if required because of tumour extent.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
920
short course 5x5Gy radiation scheme is followed by six cycles of combination chemotherapy (capecitabine and oxaliplatin (CAPOX)) and surgery. FOLFOX4 may be given as alternative for CAPOX
long course chemoradiotherapy followed by surgery. Optional adjuvant chemotherapy (CAPOX or FOLFOX) is allowed in the control group.
Siteman Cancer Center, Washington University Medical School
St Louis, Missouri, United States
Aalborg Universitetshospital
Aalborg, Denmark
Odense Universitetshospital
Odense, Denmark
University Medical Center Groningen
Groningen, PO BOX 30001, Netherlands
Noordwest Ziekenhuisgroep
Alkmaar, Netherlands
Number of Patients With Disease Related Treatment Failure (DrTF)
DrTF = Either local or distant relapse or death caused by the rectal carcinoma whichever comes first. In case of nonrectal cancer related death patients will be censored at date of death. In case of a second primary tumour patients will be censored at the date of diagnosis of the second primary tumour. In case of local regrowth after wait \& watch strategy, followed by no resection or R2 resection, diagnosis local regrowth is taken. Patients lost to follow-up will be censored the last date of patient visit. Survival curves for Disease related Treatment Failure after 3 years of follow-up will be constructed using the method of Kaplan and Meier.
Time frame: 3 years follow-up after surgery
Number of Patients Completing the Prescribe Neo-adjuvant Treatment Dose
Number of patients in the experimental arm receiving 5 fractions of x 5 Gy (5x5Gy) radiotherapy followed by at least 75% of the prescribed chemotherapy. In the standard arm receiving the prescribed chemoradiotherapy.
Time frame: 30 days after neoadjuvant treatment
Number of Patients With Negative CRM Negative
Number of patients with a Circumferential Resection Margin (CRM) \> 1 mm
Time frame: 30 days after surgery
Number of Patients With a Pathological Complete Response (pCR)
Number of patients with a Pathological Complete Response (pCR) after neo-adjuvant treatment
Time frame: 30 days after surgery
Number of Patients With Surgical Complications
Number of patients with surgical complications: wound rupture, bleeding, infection, rectal anastomotic leak
Time frame: 30 days after surgery
Quality of Life QLQ-C30 Scores
Quality of life QLQ-C30 core questionnaire EORTC quality-of-life instrument for use in international clinical trials in oncology A total Quality of Life Questionnaire (QLQ) score can range from 0 to 88, higher score means worse outcome.
Time frame: 3 year after surgery
Quality of Life Questionnaire Chemotherapy-Induced Peripheral Neuropathy (EORTC-QLQ-CIPN20)
Quality of life EORTC-QLQ-CIPN20. International EORTC questionnaire to assess Chemotherapy-Induced Peripheral Neuropathy (CIPN). A total QLQ-CIPN20 score can range from 0 to 100, higher score means worse outcome. Chemotherapy-induced peripheral neuropathy (CIPN) is a common phenomenon, often resulting in serious limitations in daily functioning and compromised quality of life.
Time frame: 3 year after surgery
Quality of Life LARS Scores
Low Anterior Resection Syndrome (LARS) scores in patients without a stoma three years after curative surgery Patient reported score (5 questions). 0-12 no LARS, 21-29 Minor LARS, 30-42 Major LARS. Higher scores mean a worse outcome.
Time frame: 3 year after surgery
Number of Patients With a Locoregional Recurrence
Number of patients with a locoregional recurrence (LRR) after an R0/R1 resection
Time frame: 5 years after surgery
Overall Survival
Overall survival will be computed as the time between randomization and colorectal cancer or treatment related death. Patients lost to follow-up will be censored the last date of patient visit. In case of a second primary tumour patients will be censored at the date of diagnosis of the second primary tumour.
Time frame: 10 year
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Amsterdam UMC, location AMC
Amsterdam, Netherlands
Amsterdam UMC, location VUMC
Amsterdam, Netherlands
Nki / Avl
Amsterdam, Netherlands
Onze Lieve Vrouwe Gasthuis
Amsterdam, Netherlands
Wilhelmina Ziekenhuis
Assen, Netherlands
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