All participants must be enrolled on protocol, "Collection of Specimens and Clinical Data from Patients with Renal Cell Carcinoma Treatment with Targeted Therapies", about to start a treatment course with sunitinib and AMG386, and willing to come in for successive MRIs at the following times: baseline, 2 weeks upon initiation of therapy with sunitinib and AMG386, after cycle 2 and/or cycle 4 of therapy, and at the end of your study therapy.