Prospective Observational Analysis Of CR With Sunitinib Treatment In mRCC Patients

This prospective study will investigate the characteristics of mRCC patients at time of CR in comparison with mRCC patients non on CR treated with Sunitinib, in order to provide some answers/ refection leads to the following questions : Can we identify blood specificity at time of CR vs non on CR? Shall we distinguish CR with sunitinib alone from combined CR (sunitinib with local treatment), while in clinical report these 2 cohorts present similar time to recurrence (ALBIGES, ASCO 2010)? Can we identify potential predictive serum biomarkers of recurrence? (With the aim of isolating blood biomarker that can help on treatment discontinuation decision?)