The safety and tolerability of CVX-060 have been established in the first-in-human clinical trial, CVX-060-101. Thus, this phase Ib/II trial is to assess the safety and pharmacokinetics (PK) profiles of combining CVX-060 with sunitinib in patients with advanced solid tumors, and to subsequently assess the treatment efficacy of the combination treatment, as well as that of sunitinib alone in patients with advanced renal cell carcinoma (mRCC).