Patients 18 years of age and older undergoing surgery. Patient samples are divided into 2 groups based on their surgery: Patients with an imaged renal mass, encompassing about 300 patients/year (about 1200 total) of both malignant (about 80-85% of time) and benign (about 15-20% of time), and patients with non-kidney cancers, encompassing about 6,000 patients/year (about 24,000 total),