Kidney cancer, also known as renal cancer, is a type of cancer that starts in the cells in the kidney. The two most common types of kidney cancer are renal cell carcinoma (RCC) and transitional cell carcinoma (TCC, also known as urothelial cell carcinoma) of the renal pelvis. These names reflect the type of cell from which the cancer developed. The different types of kidney cancer (such as RCC and UCC) develop in different ways, meaning that the diseases have different long term outcomes, and need to be staged and treated in different ways. RCC is responsible for approximately 80% of primary renal cancers, and UCC accounts the majority of the remainder. Overall five year survival rate in the United States is 73%. For cancers that are confined to the kidney, the five year survival rate is 92%, if it has spread to the surrounding lymph nodes it is 65%, and if has metastasized it is 12%.

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