Cancer is not just a disease. Cancer begins when genetic
changes impair the bodies orderly process. These cells may form a mass called a tumor.
As a cancerous tumor grows, the bloodstream or
lymphatic system may carry cancer cells to other organs of the body. During
this process which is known as metastasis, the cancer cells grow and may
develop into new tumors.
Types of cancer:
Carcinomas, Sarcomas, Leukemias, Lymphomas
Can cancer be prevented?
A substantial proportion of cancers are preventable,
and all cancers caused by abusive cigarette smoking and heavy use of alcohol
could be averted.
The World Cancer Research Fund has estimated that up
to one-third of cancer cases that occur in economically developed countries
like the U.S. are related to being overweight and poor nutrition levels. These
are all preventable.
Some cancers are related to infectious agents such
as human papillomavirus (HPV), hepatitis B virus (HBV), hepatitis C virus
(HCV), human immunodeficiency virus (HIV), and Helicobacter pylori (H. pylori)
- these may be prevented through behavioral changes and use of protective
vaccinations and antibiotic treatments.
Many of the skin cancer cases that are diagnosed
annually could be prevented by protecting skin from excessive sun exposure and
avoiding indoor tanning.
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