Primary liver cancers are cancers that originate in the liver. The most common is hepatocellular carcinoma (hepatoma). At first, liver cancer usually causes only vague symptoms (such as weight loss, loss of appetite, and fatigue). As a result, the diagnosis is often made late, and the prognosis is usually poor.
(See also Overview of Liver Tumors.)
Other primary liver cancers are uncommon or rare. For diagnosis, a biopsy is usually needed. Most people with these cancers have a poor prognosis. If the cancer has not spread, it can sometimes be removed. When it can be removed, people may live several years or longer.
This relatively slow-growing cancer originates in the lining of the bile ducts in or outside the liver. In China, infestation with liver flukes (a parasite) contributes to the development of this cancer. People with primary sclerosing cholangitis are at risk of developing cholangiocarcinoma.
Symptoms of the cancer are often vague but may include sudden deterioration of the person’s general health, a mass in the upper right part of the abdomen, jaundice (a yellowish discoloration of the skin and the whites of the eyes), weight loss, and abdominal discomfort.
A limited number of people with very small, isolated cholangiocarcinomas may be candidates for liver transplantation.
This type of hepatocellular carcinoma is rare. It usually affects relatively young adults. It is not caused by preexisting cirrhosis or hepatitis B or C and has no other known risk factors.
People with fibrolamellar carcinoma usually fare better than those with other types of hepatocellular carcinoma. Many live several years after this cancer is removed.
This cancer is rare but is one of the most common primary liver cancers in infants. Occasionally, it occurs in older children and may produce hormones (called gonadotropins) that result in early (precocious) puberty. No cause has been identified.
Health may generally deteriorate, and a mass may be felt in the upper right part of the abdomen.
A hepatoblastoma is usually suspected when doctors feel a large mass in the upper right part of an infant's abdomen and the infant’s health is deteriorating. Results of blood tests to measure levels of alpha-fetoprotein (AFP) and imaging tests may help doctors make the diagnosis. Levels of AFP—a protein normally produced by immature liver cells in fetuses—usually increase when liver cancer is present.
Cholangiocarcinoma in the liver, fibrolamellar carcinoma, hepatoblastoma, and angiosarcoma are diagnosed by liver biopsy (removal of a sample of liver tissue with a needle for examination under a microscope).
Cholangiocarcinoma of the bile ducts outside the liver is usually diagnosed using special x-ray techniques (such as magnetic resonance imaging [MRI], endoscopic retrograde cholangiopancreatography [ERCP] or percutaneous transhepatic cholangiography) or surgery. In two thirds of people with this type of cancer, the cancer has already spread to nearby lymph nodes by the time it is detected.