DefinitionGallbladder cancer is a disease in which cancer cells grow in the gallbladder. This is a relatively rare form of cancer. The gallbladder is a small pear-shaped organ that sits beneath the liver. It stores bile until it is needed by the digestive system. Bile is a greenish-yellow digestive fluid produced by the liver that helps in digesting fat.
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CausesCancer occurs when cells in the body divide without control or order. Normally, cells divide in a regulated manner. If cells keep dividing uncontrollably when new cells are not needed, a mass of tissue forms, called a growth or tumor. The term cancer refers to malignant growths. These growths can invade nearby tissues. Cancer that has invaded nearby tissues can then spread to other parts of the body.It is not clear exactly what causes these problems in the cells, but is probably a combination of genetics and environment.
Risk FactorsGallbladder cancer is more common in women and those of Native American or Hispanic descent. Other factors that may increase your chance of gallbladder cancer include:
- Gallstones or chronic inflammation of the gallbladder, including calcification of the gallbladder (porcelain gallbladder)
- Increasing age—especially 65 years and older
- Physical abnormalities of the gallbladder and ducts, such as choledochal cysts or polyps of the gallbladder
- Exposure to some chemicals, such as azotoluene and nitrosamines, found in metal processing and rubber production
- Typhoid fever or chronic salmonella infection
SymptomsGallbladder cancer often shows no symptoms in its early stages. As the disease progresses, symptoms associated with bile obstruction often develop. These include:
- Abdominal pain
- Pain in the upper back (called referred pain)
- Yellowing of the skin and whites of the eyes— jaundice
- Nausea and/or vomiting
- Loss of appetite
- Weight loss
- Liver and spleen enlargement
- Increased abdominal girth
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