The Pharmacokinetic Variability of Sunitinib in Patients With Metastatic Renal Cancer

Blood will be drawn for genotyping (predefined list of genes) just before the start of sunitinib (baseline).

"Blood will be drawn for pharmacokinetic measures between CmD15 and CmD28 of each sunitinib cycle.\*~\*Each patient will undergo several cycles of treatment with sunitinib during the monitoring period as part of routine care (= 18 months; the number of cycles per patient can vary, which is normal). Each cycle and each day of the cycle will be annotated with the letters C and D, respectively, followed by a number in chronological order. Thus C1D1 refers to to the first day of the first cycle; CmDn will be the nth day of the mth cycle."