Sunday, March 10, 2013

Cancer

   Cancer is not one disease,but a grouup of related diseases that begin as a single cell
that grows and multiplies uncontrollably and eventually forms a lump or mass called a tumor.
While most cancers develop into tumors , not  every tumor is cancer are called benign tumors.
What makes malignant tumors so deadly is their ability to spread to healthy cells beyond the site of origin.
Like heart disease,cancer does not have one cause. There are a number of factors that contribute to its development. Heredity,diet, gender,viruses,radiation.Cancer is the second leading cause of death in the United States.The types of cancer that cause the largest number of deaths in the United States are lung cancer,breast and uterine cancer in women, prostate cancer in men and colorectal cancer 
The most common cancer is cancer of the skin.



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