Pazopanib Hydrochloride in Treating Patients With Metastatic Kidney Cancer Who Have No Evidence of Disease After Surgery

This randomized phase III trial studies how well pazopanib hydrochloride works compared to placebo in treating patients with kidney cancer that has spread to other parts of the body and have no evidence of disease after surgery. Pazopanib hydrochloride may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth and by blocking blood flow to the tumor.

PRIMARY OBJECTIVES: I. To evaluate disease-free survival with pazopanib (pazopanib hydrochloride) as compared to placebo, defined as the time from randomization to the development of recurrent disease, second primary cancer (other than localized breast, localized prostate, or non-melanoma skin cancer) or death from any cause for patients with metastatic renal cell carcinoma (RCC) with no evidence of disease following metastasectomy. SECONDARY OBJECTIVES: I. To describe the overall survival of patients with advanced RCC randomly assigned to receive placebo or pazopanib for one year following metastasectomy to no evidence of disease (NED). II. To describe treatment and (at recurrence) disease-related adverse events in the two treatment arms. III. To analyze quality-adjusted time without symptoms of disease or treatment (Q-TWiST) for subjects in the two treatment arms. IV. To characterize changes in patient-reported fatigue and (at recurrence) kidney cancer-related symptoms during and following treatment with pazopanib compared to placebo. V. To explore the association between plasma trough levels of pazopanib and disease-free and overall survival. VI. To prospectively bank preserved tissue from primary tumors and associated metastatic sites in patients with RCC. OUTLINE: Patients are randomized to 1of 2 treatment arms. ARM A: Patients receive pazopanib hydrochloride orally (PO) once daily (QD) on days 1-28. Treatment repeats every 28 days for up to 13 courses in the absence of disease progression or unacceptable toxicity. ARM B: Patients receive placebo PO QD on days 1-28. Treatment repeats every 28 days for up to 13 courses in the absence of disease progression or unacceptable toxicity. Patients also undergo computed tomography (CT) or magnetic resonance imaging (MRI) throughout the study. After completion of study treatment, patients are followed up every 3 months for the first two years, every 6 months for the next 3 years, and then annually up to 10 years.