Irinotecan and Cediranib in Treating Patients With Metastatic Colorectal Cancer That Did Not Respond to Previous Oxaliplatin, Fluoropyrimidine, and Bevacizumab

RATIONALE: Drugs used in chemotherapy, such as irinotecan, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Cediranib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Giving irinotecan together with cediranib may kill more tumor cells.
PURPOSE: This phase II clinical trial is studying how well giving irinotecan together with cediranib works in treating patients with metastatic colorectal cancer that did not respond to previous oxaliplatin, fluoropyrimidine, and bevacizumab.