Diccionario de cáncer del NCI (2024)

FAQs

What is the most reliable cancer website? ›

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.

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.

The information on this site is science-based, authoritative, and up-to-date. Medical experts, cancer researchers, and editors review the content before it is published to the website.

At its most basic, cancer is a disease of the genes in the cells of our body. Genes control the way our cells work. But, changes to these genes can cause cells to malfunction, causing them to grow and divide when they should not—or preventing them from dying when they should. These abnormal cells can become cancer.

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Multi-cancer early detection (MCED) tests have the potential to find more than one type of cancer from a single sample of blood. The blood sample is tested for certain pieces of DNA or proteins from cancer cells.

Tyrosine kinase inhibitors. Tyrosine kinase inhibitors (TKIs) block chemical messengers (enzymes) called tyrosine kinases. Tyrosine kinases help to send growth signals in cells, so blocking them stops the cell growing and dividing. Cancer growth blockers can block one type of tyrosine kinase or more than one type.

Stage 4 cancer isn't usually curable, but treatment may improve overall survival and quality of life. Treatment options and survival rates for stage 4 cancer greatly depend on the type of cancer, how well it responds to treatment, a person's overall health, and several other factors.

These days, doctors are able to cure many cancers. But some cancers can come back many years after treatment. So you may find that your doctor is very unwilling to use the word 'cure'. This is so even though there is no sign that you have any cancer left.

Some general signs and symptoms associated with, but not specific to, cancer, include: Fatigue. Lump or area of thickening that can be felt under the skin. Weight changes, including unintended loss or gain.

What are the top 5 cancer sites? ›

Breast, lung and bronchus, prostate, and colorectal cancers account for almost 50% of all new cancer cases in the United States. Lung and bronchus, colorectal, pancreatic, and breast cancers are responsible for nearly 50% of all deaths.

The NCDB, begun in 1989, now contains approximately 40 million records from hospital cancer registries across the United States.