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Learn about cancer at the American Cancer Society. Find information for specific cancer types: breast, colon, lung, prostate, skin, and more.
Explanations about what cancer is, how cancer cells differ from normal cells, and genetic changes that cause cancer to grow and spread.
There are two main categories of cancer: Hematologic (blood) cancers are cancers of the blood cells, including leukemia, lymphoma, and multiple myeloma. Solid tumor cancers are cancers of any of the other body organs or tissues. The most common solid tumors are breast, prostate, lung, and colorectal cancers.
Dedicated to helping people who face cancer. Learn about cancer research, patient services, early detection, treatment and education at cancer.org.
Find out the basics about cancer, including symptoms, causes and treatments. Learn steps you can take to prevent cancer.
Information from the National Cancer Institute about cancer treatment, prevention, screening, genetics, causes, and how to cope with cancer.
Cancer is a large group of diseases that occur when abnormal cells divide rapidly and can spread to other tissue and organs. These rapidly growing cells may cause tumors. They may...
Key facts. Cancer is a leading cause of death worldwide, accounting for nearly 10 million deaths in 2020, or nearly one in six deaths. The most common cancers are breast, lung, colon and rectum and prostate cancers.
For People Affected by Cancer. NCI is the nation’s trusted source for cancer information. We are here for you with information about causes and risk factors, symptoms, how cancer is diagnosed, and treatment options. Find a Cancer Type. Treatment. Side Effects. Causes & Prevention.
Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. [ 2 ][ 7 ] These contrast with benign tumors, which do not spread. [ 7 ] . Possible signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss, and a change in bowel movements. [ 1 ] .