Patients who are candidates for first line treatment with Sunitinib 50mg 4/6 regimen in accordance with the Marketing Authorisation who meet the inclusion/exclusion criteria will be offered participation in this study during the consultation as part of their usual care. The patients will be included before Sunitinib treatment is started. Thereafter, sunitinib is initiated 50 mg/day; regimen 4/6 (Marketing Authorisation Indication), 4 weeks "on " alternating with 2 weeks "off "