Cancer, also known as a malignant tumor, is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. (Not all tumors are cancerous; benign tumors do not spread to other parts of the body.) Possible signs and symptoms include: a new lump, abnormal bleeding, a prolonged cough, unexplained weight loss, and a change in bowel movements, among others. While these symptoms may indicate cancer they may also occur due to other issues. There are over 100 different known cancers that affect humans.
According to Wikipedia, tobacco use is the cause of about 22% of cancer deaths. Another 10% is due to obesity, a poor diet, lack of physical activity, and drinking alcohol. Other factors include certain infections, exposure to ionizing radiation, and environmental pollutants. In the developing world nearly 20% of cancers are due to infections such as hepatitis B, hepatitis C, and human papillomavirus. These factors act, at least partly, by changing the genes of a cell. Typically many such genetic changes are required before cancer develops. Approximately 5–10% of cancers are due to genetic defects inherited from a person's parents. 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. Many cancers can be prevented by not smoking, eating more vegetables, fruits and whole grains, eating less meat and refined carbohydrates, maintaining a healthy weight, exercising, minimizing sunlight exposure, and being vaccinated against certain infectious diseases.
- Study: How Might Cannabidiol (CBD) Inhibit Brain Cancer? by Drake Dorm (November 29, 2013), Medical Jane
- Marijuana kills brain cancer, new study confirms by David Downs (November 18, 2014), San Francisco Chronicle
- Study: Cannabis May Treat Aggressive Forms Of Breast Cancer by Drake Dorm (October 17, 2013), Medical Jane
- Pot Fights Colon Cancer by Mike Adams (January 6, 2014), High Times
- Study: Cannabis Extracts Rich In Cannabidiol (CBD) May Effectively Treat Colon Cancer by Drake Dorm (January 9, 2014), Medical Jane
- See also: Lung health
- Breathe Easy: A Marijuana Study Finds No Lung Cancer Links by Chris Roberts (June 19, 2013), SF Weekly
- Study: Cannabinoids Could Play a Role in Pancreatic Cancer Treatment by Drake Dorm (January 29, 2014), Medical Jane
- Study: Medical Cannabis May Inhibit the Spread of Prostate Cancer by Drake Dorm (January 17, 2014), Medical Jane
- European Study: Anandamide May Fight Aggressive Skin Cancer by Drake Dorm (September 28, 2013), Medical Jane
- Smoking Marijuana Tied to Testicular Cancer by Brenda Goodman, WebMD Health News
- Study: Marijuana Use Doubles Risk of Testicular Cancer by Lindsay Abrams (September 11, 2012), The Atlantic
- Cannabis and Cannabinoids (PDQ®), National Cancer Institute
- Marijuana Fights Cancer and Helps Manage Side Effects, Researchers Find by Martin A. Lee (September 6, 2012), The Daily Beast
- Pot compound seen as tool against cancer by Victoria Colliver (September 18, 2012), San Francisco Chronicle
- Marijuana Compound Fights Cancer; Human Trials Next by Chris Roberts (September 19, 2012), NBC Bay Area
- [* Biologist Explains How THC Kills Cancer Cells (February 19, 2014), High Times
- British Study: Cannabinoids May Combine To Effectively Treat Cancer by Drake Dorm (October 14, 2013), Medical Jane
- 15 Shocking Facts You Don't Know About Weed: Pot’s a Cancer Killer by Anne Hauser (April 8, 2014), pg. 2, The Weather Channel
- New Research Shows How Marijuana Compound Can Reduce Tumor Growth In Cancer Patients by Matt Ferner (July 16, 2014), The Huffington Post
- Federal Government Unwittingly Admits Cannabis Kills Cancer by Mike Adams (April 7, 2015), High Times
- Cancer at Wikipedia. Retrieved September 30, 2014.