Study identifies surgical means for improving kidney cancer survival

June 2, 2010, Mayo Clinic

When kidney cancer spreads to other body parts, patients usually receive a poor prognosis. A new Mayo Clinic study examined the benefits of surgical treatment of kidney cancer, specifically renal cell carcinoma, and how patients saw improved prognosis of their cancer. These findings were presented today at the American Urological Association meeting in San Francisco.

Each year in the United States, there are about 50,000 new cases of kidney cancer. In adults, the most common type of kidney cancer is renal cell . The incidence of seems to be increasing, though it isn't clear why.

"Surgery remains critically important in the treatment plan for many patients. We are always looking for ways to improve patient care, including aggressive surgical management of the primary tumor and, in some cases, the metastases," says Bradley Leibovich, M.D., Mayo Clinic urological surgeon and lead author on the study.

In a Mayo Clinic study of 888 patients, those patients who had complete removal of all tumors that spread survived an average of five years. By comparison, patients who did not have any metastatic tumors removed had only a one year cancer-specific survival rate. The results are encouraging because renal cell carcinoma is difficult to cure when it has spread to other organs. In about

30 percent of the patients, the cancer has already spread by the time the cancer is diagnosed, with the lung being the most common site for spread. Surgery for renal cell carcinoma which has not spread is often curative and is therefore a vital treatment option — particularly since this type of cancer does not respond well to chemotherapy or radiation, explains Dr. Leibovich.

Significance of the Mayo Research

"Mayo Clinic maintains a Renal Nephrectomy Registry that presents 30 years of renal outcome metrics," says Dr. Leibovich. "Our analysis shows that a significant proportion of patients with multiple renal cell carcinoma metastases will experience better outcomes if all metastases are removed."

The study compared survival of three groups of cancer patients, all of whom had their kidneys removed to treat the cancer originating in the kidney. The comparison groups were made up of patients treated at Mayo Clinic from 1976, as shown below:

  1. Treatment type: No surgical removal of the metastatic tumor -- Patients in treatment category out of 888 total: 506 or 57% -- Median cancer-specific survival: 1.1 years
  2. Treatment type: Incomplete surgical removal, in which some of the spreading ca was removed, but not all -- Patients in treatment category out of 888 total: 257 or 29 -- Median cancer-specific survival: 2.6 6ears
  3. Treatment type: Complete removal to eradicate all visible tumor tissue -- Patients in treatment category out of 888 total: 125 or 14% -- Median cancer-specific survival: 4.8 years
The Role of Location

The study also showed that survival varied with the location of metastases. For example, patients whose cancer spread only to the lung fared the best when they underwent a complete removal of the lung lesion, compared to patients who underwent complete removal of tumors from all other locations. For the lung group, the median cancer-specific survival rate (CSS) computed in terms of the cancer -- not other causes of death -- was more than 10 years. This compared to a median CSS rate of 3.6 years for the patients who underwent complete removal of tumors from all other locations.

Related Stories

Recommended for you

Stem cell vaccine immunizes lab mice against multiple cancers

February 15, 2018
Stanford University researchers report that injecting mice with inactivated induced pluripotent stem cells (iPSCs) launched a strong immune response against breast, lung, and skin cancers. The vaccine also prevented relapses ...

Induced pluripotent stem cells could serve as cancer vaccine, researchers say

February 15, 2018
Induced pluripotent stem cells, or iPS cells, are a keystone of regenerative medicine. Outside the body, they can be coaxed to become many different types of cells and tissues that can help repair damage due to trauma or ...

Team paves the way to the use of immunotherapy to treat aggressive colon tumors

February 15, 2018
In a short space of time, immunotherapy against cancer cells has become a powerful approach to treat cancers such as melanoma and lung cancer. However, to date, most colon tumours appeared to be unresponsive to this kind ...

Can our genes help predict how women respond to ovarian cancer treatment?

February 15, 2018
Research has identified gene variants that play a significant role in how women with ovarian cancer process chemotherapy.

First comparison of common breast cancer tests finds varied accuracy of predictions

February 15, 2018
Commercially-available prognostic breast cancer tests show significant variation in their abilities to predict disease recurrence, according to a study led by Queen Mary University of London of nearly 800 postmenopausal women.

Catching up to brain cancer: Researchers develop accurate model of how aggressive cancer cells move and spread

February 15, 2018
A brief chat at a Faculty Senate meeting put two University of Delaware researchers onto an idea that could be of great value to cancer researchers.

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.