Well, it affects the patient the most.
skin
Males 15 to 35 years of age are most at risk.
There are many different types of cancers, and they can affect any organ in the body. The most common cancers that affect men are prostate cancer, lung cancer, and colon cancer. The most common three that affect women are breast cancer, colon cancer, and lung cancer. There are many other types than those though.
Most drugs used to treat cancer kill actively growing/replicating cells.
cancer
Teens can get vaginal cancer. Cervical cancer is one of the most common types of vaginal cancer and it can affect girls of all ages.
Lung Cancer can affect any age any time any place
yes, it can affect animals
Cancer can affect the testes.
Chemicals can both cause and fight cancer.
The colon cancer affect the digestive system.