- Bidimensionally measurable reference lesion, adequate laboratory values for hematology (white blood cell [WBC] count > 3.5´109/L, platelet count > 100´109/L), renal function (creatine clearance > 30 ml/min) and hepatic function (aspartate aminotransferase [AST] or alanine aminotransferase [ALT] < 2.5 ´ upper normal limit [UNL] and in the case of liver metastasis < 5 x UNL)