Gallbladder Cancer Risk Factors

What increases the risk of gallbladder cancer?

A risk factor is something that increases the likelihood of developing a disease. Having a risk factor does not mean someone will develop gallbladder cancer. Many people diagnosed with gallbladder cancer have one or more known risk factors, while others do not.

Gallstones

Gallstones are the most common risk factor associated with gallbladder cancer. Gallstones are hardened deposits that form in the gallbladder, usually from substances found in bile. Over time, gallstones may contribute to chronic irritation and inflammation of the gallbladder lining. However, most people with gallstones never develop gallbladder cancer. Because gallstones are common and gallbladder cancer is rare, gallstones alone generally do not justify gallbladder removal solely to prevent cancer.

Chronic gallbladder inflammation

Chronic cholecystitis is long-term inflammation of the gallbladder. Repeated inflammation may damage the gallbladder lining and contribute to abnormal cellular changes.

Porcelain gallbladder

Porcelain gallbladder is a condition in which calcium deposits develop in the gallbladder wall. Some patterns of calcification have been associated with increased cancer risk. However, newer evidence suggests the risk is lower than previously believed, and management depends on the type of calcification and other individual factors.

Gallbladder polyps

Gallbladder polyps are growths that develop from the gallbladder lining. Most are benign, but certain polyps may carry an increased risk of cancer. Risk depends on factors such as:

• Polyp size

• Growth over time

• Appearance on imaging

• Age

• Other risk factors

Larger or suspicious polyps may require surgical removal.

Increasing age

Gallbladder cancer becomes more common with increasing age. Most cases occur in older adults.

Female sex

Gallbladder cancer occurs more frequently in women than men. This may be partly related to differences in gallstone prevalence and other biological factors.

Obesity

Obesity is associated with an increased risk of gallstones and gallbladder cancer.

Primary sclerosing cholangitis

Primary sclerosing cholangitis (PSC) is a chronic disease that causes inflammation and scarring of the bile ducts. PSC is strongly associated with bile duct cancer and may also increase the risk of gallbladder abnormalities and gallbladder cancer.

Abnormal bile duct anatomy

Certain congenital abnormalities, including choledochal cysts and abnormal pancreaticobiliary duct junctions, can increase the risk of biliary tract cancers.

Chronic infections

Chronic infection with Salmonella Typhi, the bacterium that causes typhoid fever, has been associated with increased gallbladder cancer risk in some populations, particularly among chronic carriers.

Family history and genetics

A family history of gallbladder cancer may increase risk, although most cases are not caused by a known inherited cancer syndrome. Researchers continue to study genetic changes associated with the disease.

Geographic and population differences

Gallbladder cancer rates vary significantly worldwide. Higher rates have been reported in certain populations in South America and parts of Asia. These differences likely reflect a combination of environmental, genetic, and gallstone-related factors.