What is kidney cancer?
The kidneys filter waste from the blood to be expelled in urine. There are several types of kidney cancer. The most common kind is renal cell carcinoma, which accounts for 90 percent of kidney cancer cases.
Cancer can also start in the adrenal glands, which sit atop the kidneys. The hormones made by these glands regulate many body functions, including heart rate and blood pressure. Most adrenal tumors are not cancerous and can be surgically removed. Cancerous adrenal tumors are usually found because of the symptoms they cause.