Maintenance Treatment Versus Observation After Induction in Advanced Colorectal Carcinoma

The optimal duration of systemic treatment in patients with advanced colorectal cancer is unknown.
In this study the effects of bevacizumab and low-dose continuous chemotherapy with capecitabine is investigated in patients who have responded to 6 courses of oxaliplatin, capecitabine and bevacizumab ("induction treatment", at standard doses). This treatment is continued until progression or severe toxicity. This regimen is compared to the effects a observation without treatment after the induction treatment.
In case of disease progression, induction treatment will be reintroduced.