Renal cell cancer is a disease in which malignant (cancer) cells form in tubules of the kidney.
Renal cell cancer (also called kidney cancer or renal adenocarcinoma) is a disease in which malignant (cancer) cells are found in the lining of tubules (very small tubes) in the kidney. There are 2 kidneys, one on each side of the backbone, above the waist. The tiny tubules in the kidneys filter and clean the blood, taking out waste products and making urine. The urine passes from each kidney into the bladder through a long tube called a ureter. The bladder stores the urine until it is passed from the body.
Anatomy of the male urinary system; shows the right and left kidneys, the ureters, the bladder filled with urine, and the urethra passing through the penis. The inside of the left kidney shows the renal pelvis. An inset shows the renal tubules and urine. Also shown is the prostate.
Anatomy of the female urinary system; shows the right and left kidneys, the ureters, the bladder filled with urine, and the urethra. The inside of the left kidney shows the renal pelvis. An inset shows the renal tubules and urine. The uterus is also shown.
Anatomy of the male urinary system (left) and female urinary system (right) showing the kidneys, ureters, bladder, and urethra. Urine is made in the renal tubules and collects in the renal pelvis of each kidney. The urine flows from the kidneys through the ureters to the bladder. The urine is stored in the bladder until it leaves the body through the urethra.
Cancer that starts in the ureters or the renal pelvis (the part of the kidney that collects urine and drains it to the ureters) is different from renal cell cancer. (See the PDQ summary about Transitional Cell Cancer of the Renal Pelvis and Ureter Treatment for more information).
Smoking and misuse of certain pain medicines can affect the risk of renal cell cancer.
Anything that increases your risk of getting a disease is called a risk factor. Having a risk factor does not mean that you will get cancer; not having risk factors doesn’t mean that you will not get cancer. Talk with your doctor if you think you may be at risk. Risk factors for renal cell cancer include the following:
- Misusing certain pain medicines, including over-the-counter pain medicines, for a long time.
- Having certain genetic conditions, such as von Hippel-Lindau disease or hereditary papillary renal cell carcinoma.
Possible signs of renal cell cancer include blood in the urine and a lump in the abdomen.
These and other symptoms may be caused by renal cell cancer. Other conditions may cause the same symptoms. There may be no symptoms in the early stages. Symptoms may appear as the tumor grows. Check with your doctor if you have any of the following problems:
- Blood in the urine.
- A lump in the abdomen.
- A pain in the side that doesn’t go away.
- Loss of appetite.
- Weight loss for no known reason.
Tests that examine the abdomen and kidneys are used to detect (find) and diagnose renal cell cancer.
The following tests and procedures may be used:
- Physical exam and history: An exam of the body to check general signs of health, including checking for signs of disease, such as lumps or anything else that seems unusual. A history of the patient’s health habits and past illnesses and treatments will also be taken.
- Blood chemistry studies: A procedure in which a blood sample is checked to measure the amounts of certain substances released into the blood by organs and tissues in the body. An unusual (higher or lower than normal) amount of a substance can be a sign of disease in the organ or tissue that makes it.
- Urinalysis: A test to check the color of urine and its contents, such as sugar, protein, red blood cells, and white blood cells.
- Liver function test: A procedure in which a sample of blood is checked to measure the amounts of enzymes released into it by the liver. An abnormal amount of an enzyme can be a sign that cancer has spread to the liver. Certain conditions that are not cancer may also increase liver enzyme levels.
- Intravenous pyelogram (IVP): A series of x-rays of the kidneys, ureters, and bladder to find out if cancer is present in these organs. A contrast dye is injected into a vein. As the contrast dye moves through the kidneys, ureters, and bladder, x-rays are taken to see if there are any blockages.
- Ultrasound exam: A procedure in which high-energy sound waves (ultrasound) are bounced off internal tissues or organs and make echoes. The echoes form a picture of body tissues called a sonogram.
- CT scan (CAT scan): A procedure that makes a series of detailed pictures of areas inside the body, taken from different angles. The pictures are made by a computer linked to an x-ray machine. A dye may be injected into a vein or swallowed to help the organs or tissues show up more clearly. This procedure is also called computed tomography, computerized tomography, or computerized axial tomography.
- MRI (magnetic resonance imaging): A procedure that uses a magnet, radio waves, and a computer to make a series of detailed pictures of areas inside the body. This procedure is also called nuclear magnetic resonance imaging (NMRI).
- Biopsy: The removal of cells or tissues so they can be viewed under a microscope by a pathologist to check for signs of cancer. To do a biopsy for renal cell cancer, a thin needle is inserted into the tumor and a sample of tissue is withdrawn.
Certain factors affect prognosis (chance of recovery) and treatment options.
- The prognosis (chance of recovery) and treatment options depend on the following:
- The stage of the disease.
- The patient’s age and general health.