Kidney cancer is a disease in which cancer cells grow in the kidneys. The kidneys are two bean-shaped organs, located just above the waist, on each side of the spine. Their main function is to filter the blood and produce urine by which the body rids itself of waste products and excess water.
Cancer occurs when cells in the body (in this case kidney cells) divide without control or order. Normally, cells divide in a regulated manner. If cells keep dividing uncontrollably when new cells are not needed, a mass of tissue forms, called a growth or tumor. The term cancer refers to
malignant tumors, which can invade nearby tissue and spread to other parts of the body. A
does not invade or spread.
, which occurs predominantly in children, and renal cell carcinoma in adults. The cells that line the ureter may also give rise to transitional cell cancer, and the connective tissues of the kidney may produce sarcomas, which are rare.
Your doctor will ask about your symptoms and medical history, and perform a physical exam.
Tests may include:
Blood and urine tests—to check kidney function or find substances that indicate kidney cancer may be present
—for this test, you receive a special radioactive material that specifically lights up bones that are undergoing an active process, such as tumor growth. Kidney cancer likes to spread to the bones and this test is often performed to ensure the bones are not involved by the cancer.
and abdomen x-ray—a test that uses radiation to take pictures of structures inside the body
—an x-ray of the kidneys and ureters after injection of contrast dye into the blood
—an x-ray of arteries that are leading to a possible kidney tumor
—a type of x-ray that uses a computer to make pictures of the inside of the kidneys and the surrounding area
—a test that uses magnetic waves to make pictures of the inside of the kidneys and the surrounding area
—a test that uses sound waves to examine the kidneys
—a thin, lighted tube inserted through a small incision in the abdomen to look at the kidney
—examination of the bladder, ureters, and kidneys via a thin tube inserted through the urethra
—removal of a sample of kidney tissue to test for cancer cells
Once kidney cancer is found, staging tests are performed to find out if the cancer has spread and, if so, to what extent. Treatment depends on the stage.
Surgery is the most important component of any curative approach to kidney cancer. There is some information suggesting immunotherapies (interleukin or interferon) may be of some benefit. Radiation can be used to treat kidney cancer that has spread to the lung, bones, or brain, but it is not considered curative.
This involves the removal of a cancerous tumor, nearby tissue, and possibly nearby lymph nodes. Surgeries to treat kidney cancer include:
—removal of the entire kidney, adrenal gland, and nearby fatty tissue and lymph nodes
Partial nephrectomy—removal of the cancerous part of the kidney only, used to treat smaller tumors that have not spread locally.
Removal of metastases—removal of cancerous tissue that has spread to other parts of the body, particularly when causing symptoms
This is the use of
to kill cancer cells and shrink tumors. Radiation may be:
External radiation therapy—radiation directed at the tumor from a source outside the body
This is the use of drugs to kill cancer cells.
may be given in many forms including pill, injection, and via a catheter. The drugs enter the bloodstream and travel through the body killing mostly cancer cells but also some healthy cells.
This procedure is the use of drugs like interleukin-2 and interferon to help the immune system to better fight and destroy cancer cells.
If you are diagnosed with kidney cancer, follow your doctor's
Measures to prevent kidney cancer are limited:
Avoid using tobacco products.
Avoid occupational exposures.
See your doctor at the first sign of possible symptoms, since early detection is the key to cure.
Please be aware that this information is provided to supplement the care
provided by your physician. It is neither intended nor implied to be a
substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER
IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the
advice of your physician or other qualified health provider prior to
starting any new treatment or with any questions you may have regarding a