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  1. What Is Cancer? - NCI

    Oct 11, 2021 · Explanations about what cancer is, how cancer cells differ from normal cells, and genetic changes that cause cancer to grow and spread.

  2. Cancer - World Health Organization (WHO)

    Apr 16, 2026 · WHO fact sheet on cancer providing information on the health burden of different types of cancer, causes, risk factors, prevention, early diagnosis, treatment, palliative care, and WHO's work …

  3. Cancer - Wikipedia

    The cancers causing the most deaths, as of 2020 are lung cancer (1.8 million), colorectal cancer (916,000), liver cancer (830,000), stomach cancer (769,000) and breast cancer (685,000). [2]

  4. Cancer | Definition, Causes, Types, & Treatment | Britannica

    Jun 18, 2026 · Cancer is a disease characterized by the uncontrolled multiplication of abnormal cells in the body. There are numerous types of cancers, with certain types being major causes of sickness …

  5. What Is Cancer? Symptoms, Causes & Types - Cleveland Clinic

    Aug 19, 2024 · Having cancer is a life-changing event. Knowing what to expect — from diagnosis to recovery — can empower you and help you take control of your health. This is a general overview of …

  6. Cancer - Symptoms and causes - Mayo Clinic

    Nov 19, 2024 · Find out the basics about cancer, including symptoms, causes and treatments. Learn steps you can take to prevent cancer.

  7. Cancer - Wiley Online Library

    Spanning the breadth of oncology disciplines, Cancer delivers something for everyone involved in cancer research, risk reduction, treatment, and patient care.

  8. Cancer: Symptoms, Causes, Treatment, Stages, Prevention

    Read about cancer symptoms, causes, treatment, stages, prognosis, diagnosis, types, and prevention. Learn what cancer is and what causes it. Inform yourself about the role viruses play in contributing to …

  9. Cancer: Types, Causes, Treatment, and Prevention - Healthline

    Jan 17, 2023 · Cancer is a group of diseases that occur when abnormal cells divide rapidly and spread. Learn the types, causes, treatments, and prevention methods.

  10. 15 Early Symptoms That Could Be a Sign of Cancer - Health

    Feb 21, 2026 · Early signs of cancer can include swelling in the neck and skin sores that will not heal. Other symptoms include unusual pain and ongoing itching.