Kidney cancer is cancer that begins in the kidneys your kidneys are two bean shaped organs each about the size of your fist theyre located behind your abdominal organs with one kidney on each side of your spine in adults renal cell carcinoma is the most common type of kidney cancer other less common types of kidney cancer can occur young children are more likely to develop a kind of kidney cancer called wilms tumor. Kidney cancer is also called renal cancer it is one of the ten most common cancers in both men and women. Kidney cancer is a disease that starts in the kidneys it happens when healthy cells in one or both kidneys grow out of control and form a lump called a tumor kidney cancer protect your kidneys throughout your kidney cancer journey. You have one kidney each side of your back just below the rib cage they help clean your blood of waste which then leaves your body as urine when you pee kidney cancer is when faulty cells grow