Bladder Cancer

+ -Text Size

What Is Bladder Cancer? TOPICS

Key statistics for bladder cancer

How common is bladder cancer?

The American Cancer Society’s estimates for bladder cancer in the United States for 2016 are:

  • About 76,960 new cases of bladder cancer (about 58,950 in men and 18,010 in women)
  • About 16,390 deaths from bladder cancer (about 11,820 in men and 4,570 in women)

The rates of new bladder cancers and of cancer deaths and have been dropping slightly in women in recent years. In men, incidence rates have been decreasing and death rates have been stable.

Bladder cancer accounts for about 5% of all new cancers in the US. It is the fourth most common cancer in men, but it is less common in women.

Risk of bladder cancer

Bladder cancer occurs mainly in older people. About 9 out of 10 people with this cancer are over the age of 55. The average age at the time of diagnosis is 73.

Men are about 3 to 4 times more likely to get bladder cancer during their lifetime than women. Overall, the chance men will develop this cancer during their life is about 1 in 26. For women, the chance is about 1 in 88. (But each person’s chances of getting bladder cancer can be affected by certain risk factors.)

Whites are diagnosed with bladder cancer about twice as often as African Americans or Hispanic Americans.

Extent of cancer at the time of diagnosis

About half of all bladder cancers are first found while the cancer is still confined to the inner layer of the bladder wall. (These are called non-invasive or in situ cancers.) About 1 in 3 bladder cancers have invaded into deeper layers but are still only in the bladder. In most of the remaining cases, the cancer has spread to nearby tissues or lymph nodes outside the bladder. Rarely (in about 4% of cases), it has spread to distant parts of the body. Black patients are slightly more likely to have more advanced disease when they are diagnosed, compared to whites.

Survival statistics are discussed in Survival rates for bladder cancer, by stage.

Visit the American Cancer Society’s Cancer Statistics Center for more key statistics.

Bladder cancer risk factors

A risk factor is anything that changes your chance of getting a disease such as cancer. Different cancers have different risk factors. Some risk factors, like smoking, can be changed. Others, like a person’s age or family history, can’t be changed.

But having a risk factor, or even several, does not mean that you will get the disease. Many people with risk factors never get bladder cancer, while others with this disease may have few or no known risk factors.

Still, it’s important to know about the risk factors for bladder cancer because there may be things you can do that might lower your risk of getting it. If you are at higher risk because of certain factors, you might be helped by tests that could find it early, when treatment is most likely to be effective.

Several risk factors make a person more likely to develop bladder cancer.

Risk factors you can change

Smoking

Smoking is the most important risk factor for bladder cancer. Smokers are at least 3 times as likely to get bladder cancer as nonsmokers. Smoking causes about half of all bladder cancers in both men and women.

If you or someone you know smokes and would like help quitting, see Guide to Quitting Smoking, or call us at 1-800-227-2345 for more information.

Workplace exposures

Certain industrial chemicals have been linked with bladder cancer. Chemicals called aromatic amines, such as benzidine and beta-naphthylamine, which are sometimes used in the dye industry, can cause bladder cancer.

Workers in other industries that use certain organic chemicals also may have a higher risk of bladder cancer. Industries carrying higher risks include makers of rubber, leather, textiles, and paint products as well as printing companies. Other workers with an increased risk of developing bladder cancer include painters, machinists, printers, hairdressers (probably because of heavy exposure to hair dyes), and truck drivers (likely because of exposure to diesel fumes).

Cigarette smoking and workplace exposures can act together to cause bladder cancer. Smokers who also work with cancer-causing chemicals have an especially high risk of bladder cancer.

Certain medicines or herbal supplements

According to the US Food and Drug Administration (FDA), use of the diabetes medicine pioglitazone (Actos) for more than one year may be linked with an increased risk of bladder cancer. This possible link is still an area of active research.

Dietary supplements containing aristolochic acid (mainly in herbs from the Aristolochia family) have been linked with an increased risk of urothelial cancers, including bladder cancer.

Arsenic in drinking water

Arsenic in drinking water has been linked with a higher risk of bladder cancer in some parts of the world. The chance of being exposed to arsenic depends on where you live and whether you get your water from a well or from a public water system that meets the standards for low arsenic content. For most Americans, drinking water is not a major source of arsenic.

Not drinking enough fluids

People who drink a lot of fluids, especially water, each day tend to have lower rates of bladder cancer. This might be because they empty their bladders more often, which could keep chemicals from lingering in their bladder.

Risk factors you cannot change

Race and ethnicity

Whites are about twice as likely to develop bladder cancer as African Americans and Hispanics. Asian Americans and American Indians have slightly lower rates of bladder cancer. The reasons for these differences are not well understood.

Age

The risk of bladder cancer increases with age. About 9 out of 10 people with bladder cancer are older than 55.

Gender

Bladder cancer is much more common in men than in women.

Chronic bladder irritation and infections

Urinary infections, kidney and bladder stones, bladder catheters left in place a long time, and other causes of chronic bladder irritation have been linked with bladder cancer (especially squamous cell carcinoma of the bladder), but it’s not clear if they actually cause bladder cancer.

Schistosomiasis (also known as bilharziasis), an infection with a parasitic worm that can get into the bladder, is also a risk factor for bladder cancer. In countries where this parasite is common (mainly in Africa and the Middle East), squamous cell cancers of the bladder are seen much more often. This is an extremely rare cause of bladder cancer in the United States.

Personal history of bladder or other urothelial cancer

Urothelial carcinomas can sometimes form in different areas in the bladder, as well as in the lining of the kidney, the ureters, and urethra. Having a cancer in the lining of any part of the urinary tract puts you at higher risk of having another cancer, either in the same area as before, or in another part of the urinary tract. This is true even when the first tumor is removed completely. For this reason, people who have had bladder cancer need careful follow-up to look for new cancers.

Bladder birth defects

Before birth, there is a connection between the belly button and the bladder. This is called the urachus. If part of this connection remains after birth, it could become cancerous. Cancers that start in the urachus are usually adenocarcinomas, which are made up of cancerous gland cells. About one-third of the adenocarcinomas of the bladder start here. However, this is still rare, accounting for less than half of 1% of all bladder cancers.

Another rare birth defect called exstrophy greatly increases a person’s risk of bladder cancer. In bladder exstrophy, both the bladder and the abdominal wall in front of the bladder don’t close completely during fetal development and are fused together. This leaves the inner lining of the bladder exposed outside the body. Surgery soon after birth can close the bladder and abdominal wall (and repair other related defects), but people who have this still have a higher risk for urinary infections and bladder cancer.

Genetics and family history

People who have family members with bladder cancer have a higher risk of getting it themselves. Sometimes this may be because the family members are exposed to the same cancer-causing chemicals (such as those in tobacco smoke). They may also share changes in some genes (like GST and NAT) that make it hard for their bodies to break down certain toxins, which can make them more likely to get bladder cancer.

A small number of people inherit a gene syndrome that increases their risk for bladder cancer. For example:

  • A mutation of the retinoblastoma (RB1) gene can cause cancer of the eye in infants, and also increases the risk of bladder cancer.
  • Cowden disease, caused by mutations in the PTEN gene, is linked mainly to cancers of the breast and thyroid. People with this disease also have a higher risk of bladder cancer.
  • Lynch syndrome (also known as hereditary non-polyposis colorectal cancer, or HNPCC) is linked mainly to colon and endometrial cancer. People with this syndrome might also have an increased risk of bladder cancer (as well as other cancers of the urinary tract).

For information on being tested for inherited gene changes that increase cancer risk, see Genetic Testing: What You Need to Know.

Prior chemotherapy or radiation therapy

Taking the chemotherapy drug cyclophosphamide (Cytoxan) for a long time can irritate the bladder and increase the risk of bladder cancer. People taking this drug are often told to drink plenty of fluids to help protect the bladder from irritation.

People who are treated with radiation to the pelvis are more likely to develop bladder cancer.


Last Medical Review: 02/26/2014
Last Revised: 02/08/2016