Let the author say one thing about cancer: no single environment caused the disease so no one caught or inherited the sickness, just the gene. How does anyone get cancer? No one contracts this demon through any normal means. Common cancers include lung, liver, stomach, brain, pancreatic. With so many possibilities of where occurred the infection, the malfunction could not come from any particular place on the body. Also, the abnormality would never go out its environment when the abnormality felt right at home in its environment. What will cause cancer (no matter which type) to invade the healthy human body?
Cancer only occurs when the healthy human body attacks itself. As a result, the lymph nodes spread cancer around the healthy human body. Eventually, the disease invades a vital organ in its path. Death can come quick or spends too much time on a limbo mission. Dependent by the vital organ with the disease determines the type of cancer. Obviously, lung cancer means the lungs with the life ending sickness. Lung cancer does not mean the lungs cause the life ending sickness. Obviously, liver cancer means the liver with the life ending sickness. Liver cancer does not mean the liver causes the life ending sickness. Obviously, stomach cancer means the stomach with the life ending sickness. Stomach cancer does not mean the stomach causes the life ending sickness. Obviously, brain cancer means the brain with the life ending sickness. Brain cancer does not mean the brain causes the life ending sickness. Obviously, pancreatic cancer means the pancreas with the life ending sickness. Pancreatic cancer does not mean the pancreas causes the life ending sickness.
What does cause the life ending sickness, cancer? Good white blood cells which went bad for various reasons. Why would a healthy antibody source go rogue after awhile? This query lends itself to a few answers__ old age, chemical or physical imbalance, an inherent condition, biology, chemistry, physics, geology, youth, a previous illness, the circle of life, the stars in the sky, amoeba and protist, etc. One good reason which engendered the previous causes effected the drugs mingling with the person’s system. What kind of drugs does not matter. How the drugs came about does not matter. Life matters most.
Numerous domino chains lead up to cancer. Cancer can get very sneaky. This reasoning showed how cancer became so dangerous too fast. Medicine remedied advancement.