Cancer is a class of diseases characterized by out-of-control cell growth. There are over 100 different types of cancer, and each is classified by the type of cell that is initially affected.

 Cancer harms the body when altered cells divide uncontrollably to form lumps or masses of tissue called tumors (except in the case of leukemia where cancer prohibits normal blood function by abnormal cell division in the blood stream). Tumors can grow and interfere with the digestive, nervous, and circulatory systems, and they can release hormones that alter body function. Tumors that stay in one spot and demonstrate limited growth are generally considered to be benign.

ndividual types of cancer There are said to be over 200 different types of cancer. We have the following common cancer types covered in individual Knowledge Center articles: Anal cancer Bladder cancer Bone cancer Breast cancer Cervical cancer Colon cancer Colorectal cancer Endometrial cancer Kidney cancer Leukemia Liver cancer Lymphoma Ovarian cancer Pancreatic cancer Prostate cancer Stomach cancer Testicular cancer Thyroid cancer Vaginal cancer Vulvar cancer Latest cancer research We are a leading publisher of worldwide cancer news and research. You can find all our latest news in our cancer news section. The rest of this article will focus on what cancer is, what causes cancer, the symptoms, diagnosis and available treatments. Fast facts on cancer Here are some key points about cancer. More detail and supporting information is in the main article. More than 575,000 people die of cancer, and more than 1.5 million people are diagnosed with cancer per year in the US. Cancer is considered to be one of the leading causes of morbidity and mortality worldwide. The financial costs of cancer in the US per year are an estimated $263.8 billion in medical costs and lost productivity. African Americans are more likely to die of cancer than people of any other race or ethnicity. It is believed that cancer risk can be reduced by avoiding tobacco, limiting alcohol intake, limiting UV ray exposure from the sun and tanning beds and maintaining a healthy diet, level of fitness and seeking regular medical care. Screening can locate cervical cancer, colorectal cancer and breast cancer at an early, treatable stage. Vaccines such as the human papillomavirus (HPV) vaccine assists in preventing some cervical, vaginal, vulvar, and oral cancers. A vaccine for hepatitis B can reduce liver cancer risk. According to the World Health Organization (WHO), the numbers of new cancer cases is expected to rise by about 70% over the next 20 years. The most common sites of cancer among men are lung, prostate, colon, rectum, stomach and liver. The most common sites of cancer among women are breast, colon, rectum, lung, cervix and stomach.

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