Biological, Pathological and Imagery Markers in the First-line Treatment of Metastatic Clear-cell Renal Cell Carcinoma

"Sunitinib, SUTENT, 50 mg daily p.o., on schedule 4/2, for 2 cycles. Two weeks of rest prior to surgery (week 11 and 12).~Radical nephrectomy at the end of week 12. Sunitinib 50 mg/d, schedule 4/2, reintroduced 2 weeks after surgery (week 14, may be postponed by one or two weeks if wound healing delay or surgical complications). Treatment until disease progression, unacceptable toxicity or consent withdrawal. Dose reduction depending on the type and severity of toxicity.~At the end of the treatment period patients will be treated at the discretion of the Investigator."