Pre-operative Administration of Sorafenib in Patients With Metastatic Renal Cell Carcinoma Undergoing Kidney Removal

The purpose of this study is to see if preoperative administration of Sorafenib reduces the size of the primary kidney tumour in patients with metastatic disease undergoing cytoreductive surgery. The study will also assess the safety of preoperative Sorafenib. The study drug, Sorafenib, will be given to patients preoperatively for 12 weeks. After a 1 week washout period the patient will then have their nephrectomy (kidney removed). Approximately 6 weeks following their nephrectomy, patients will resume on study drug until disease progression.