detailed study about cancer
Answers
Explanation:
Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body.These contrast with benign tumors, which do not spread. Possible signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss, and a change in bowel movements.While these symptoms may indicate cancer, they can also have other causes. Over 100 types of cancers affect humans.
Tobacco use is the cause of about 22% of cancer deaths.Another 10% are due to obesity, poor diet, lack of physical activity or excessive drinking of alcohol.Other factors include certain infections, exposure to ionizing radiation, and environmental pollutants. In the developing world, 15% of cancers are due to infections such as Helicobacter pylori, hepatitis B, hepatitis C, human papillomavirus infection, Epstein–Barr virus and human immunodeficiency virus (HIV). These factors act, at least partly, by changing the genes of a cell.Typically, many genetic changes are required before cancer develops.Approximately 5–10% of cancers are due to inherited genetic defects.Cancer can be detected by certain signs and symptoms or screening tests. It is then typically further investigated by medical imaging and confirmed by biopsy.
- Cancer is a condition in which cells in the body grow out of control and spread to other regions of the body.
- Cancer can begin in any of the billions of cells that make up the human body.
- Human cells normally divide and proliferate to generate new cells as needed by the body.
- Cells die when they get too old or damaged to function, and new cells replace them. Cancer and Normal Cells: What's the Difference?
- Cell cancer
- This ordered process can occasionally break down, resulting in aberrant or damaged cells growing and multiplying when they shouldn't.
- Tumors, which are masses of tissue, may grow from these cells.
- Cancerous or non-cancerous tumours exist (benign). What Causes Cancer?