Treatment and Diagnosis:
If a patient has symptoms that suggest kidney cancer, the doctor may perform one or more of the following procedures:
If a patient has symptoms that suggest kidney cancer, the doctor may perform one or more of the following procedures:
- Physical
exam: The doctor checks general signs of health and tests for
fever and high blood pressure. The doctor also feels the abdomen and side
for tumors.
- Urine
tests: Urine is checked for blood and other signs of disease.
- Blood
tests: The lab checks the blood to see
how well the kidneys are working. The lab may check the level of several
substances, such as creatinine. A high level of creatinine may mean the
kidneys are not doing their job.
- Intravenous
pyelogram (IVP): The doctor
injects dye into a vein in the arm. The dye travels through the body and
collects in the kidneys. The dye makes them show up on x-rays. A series of
x-rays then tracks the dye as it moves through the kidneys to the ureters
and bladder. The x-rays can show a kidney tumor or other problems.
- CT
scan (CAT scan): An x-ray machine linked to a computer takes a series of
detailed pictures of the kidneys. The patient may receive an injection of
dye so the kidneys show up clearly in the pictures. A CT scan can show a
kidney tumor.
- Ultrasound
test: The ultrasound device uses
sound waves that people cannot hear. The waves bounce off the kidneys, and
a computer uses the echoes to create a picture called a sonogram. A solid
tumor or cyst shows up on a sonogram.
- Biopsy: In some cases, the doctor may do a biopsy. A biopsy is
the removal of tissue to look for cancer cells. The doctor inserts a thin
needle through the skin into the kidney to remove a small amount of
tissue. The doctor may use ultrasound or x-rays to guide the needle. A
pathologist uses a microscope to look for cancer cells in the tissue.
- Surgery: In most cases, based
on the results of the CT scan, ultrasound, and x-rays, the doctor has
enough information to recommend surgery to remove part or the entire
kidney. A pathologist makes the final diagnosis by examining the tissue
under a microscope.
Staging
To plan the best treatment, the doctor needs to know the stage (extent) of the
disease. The stage is based on the size of the tumor, whether the cancer has
spread and, if so, to what parts of the body.Staging may involve imaging tests such as an ultrasound or a CT scan. The doctor also may use an MRI. For this test, a powerful magnet linked to a computer makes detailed pictures of organs and blood vessels.
Doctors describe kidney cancer by the following stages:
- Stage
I is an early stage of kidney cancer. The tumor measures
up to 2 3/4 inches (7 centimeters). It is no bigger than a tennis
ball. The cancer cells are found only in the kidney.
- Stage
II is also an early stage of kidney cancer, but the tumor
measures more than 2 3/4 inches. The cancer cells are found only in the
kidney.
- Stage
III is one of the following:
- The tumor does not extend
beyond the kidney, but cancer cells have spread through the lymphatic
system to one nearby lymph node; or
- The tumor has invaded the
adrenal gland or the layers of fat and fibrous tissue that surround the
kidney, but cancer cells have not spread beyond the fibrous tissue.
Cancer cells may be found in one nearby lymph node; or
- The cancer cells have spread
from the kidney to a nearby large blood vessel. Cancer cells may be found
in one nearby lymph node.
- Stage
IV is one of the following:
- The tumor extends beyond the
fibrous tissue that surrounds the kidney; or
- Cancer cells are found in more
than one nearby lymph node; or
- The cancer has spread to other
places in the body such as the lungs.
- Recurrent
cancer is cancer that has come back (recurred) after
treatment. It may come back in the kidney or in another part of the body.
Surgery
Surgery is the most common treatment for kidney cancer. It is a type of local therapy. It treats cancer in the kidney and the area close to the tumor.
An operation to remove the kidney is called a nephrectomy. There are several types of nephrectomies. The type depends mainly on the stage of the tumor. The doctor can explain each operation and discuss which is most suitable for the patient:
- Radical nephrectomy: Kidney cancer is usually treated with radical nephrectomy. The surgeon removes the entire kidney along with the adrenal gland and some tissue around the kidney. Some lymph nodes in the area also may be removed.
- Simple nephrectomy: The surgeon removes only the kidney. Some people with Stage I kidney cancer may have a simple nephrectomy.
- Partial nephrectomy: The surgeon removes only the part of the kidney that contains the tumor. This type of surgery may be used when the person has only one kidney, or when the cancer affects both kidneys. Also, a person with a small kidney tumor (less than 4 centimeters) may have this type of surgery.
Arterial embolization
Arterial embolization is a type of local therapy that shrinks the tumor. Sometimes it is done before an operation to make surgery easier. When surgery is not possible, embolization may be used to help relieve the symptoms of kidney cancer.
Radiation therapy (also called radiotherapy) is another type of local therapy. It uses high-energy rays to kill cancer cells. It affects cancer cells only in the treated area. A large machine directs radiation at the body. The patient has treatment at the hospital or clinic, 5 days a week for several weeks.
A small number of patients have radiation therapy before surgery to shrink the tumor. Some have it after surgery to kill cancer cells that may remain in the area. People who cannot have surgery may have radiation therapy to relieve pain and other problems caused by the cancer.
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