What Is Cancer? - NCI - National Cancer Institute
Cancer is a disease caused when cells divide uncontrollably and spread into surrounding tissues. Cancer is caused by changes to DNA. Most cancer-causing DNA changes occur in sections of DNA called genes. These changes are also called genetic changes.
Cancer - Symptoms and causes - Mayo Clinic
Dec 7, 2022 · Find out the basics about cancer, including symptoms, causes and treatments. Learn steps you can take to prevent cancer.
What Is Cancer? Symptoms, Causes & Types - Cleveland Clinic
Aug 19, 2024 · Cancer is when abnormal cells grow out of control and spread to other areas of your body. It can start almost anywhere, including skin, organs, bones and blood.
Cancer - World Health Organization (WHO)
Feb 3, 2022 · 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.
Cancer: Types, Causes, Treatment, and Prevention - Healthline
Jan 17, 2023 · 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 also disrupt...
Cancer - Wikipedia
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]
What Is Cancer? | Cancer Basics | American Cancer Society
What Is Cancer? Cancer affects 1 in 3 people in the United States. Chances are that you or someone you know has been affected by cancer. Here is some information to help you better understand what cancer is. On this page. [show] You are made up of trillions of cells that over your lifetime normally grow and divide as needed.
American Cancer Society - Information and Resources about Cancer ...
Dedicated to helping people who face cancer. Learn about cancer research, patient services, early detection, treatment and education at cancer.org.
Comprehensive Cancer Information - NCI
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 & …
Understanding Cancer | What Is Cancer? - American Cancer Society
Cancer is more than just one disease. There are many types of cancer, and it can develop anywhere in the body. Learn more about what cancer is, how it starts, and why it can be hard to cure.