Cancer
Cancer cells can also spread to other parts of the body through theblood and lymph systems.
CAUSES
*Lifestyle related factors
· · · · Some food related factors, such as nitrites and poly aromatichydrocarbons generated by barbecuing food.
*Factors related to work andliving environment :
Occupational risk factors, including carcinogens such as many chemicals,radioactive materials and asbestos.
*Biological or internalfactors
Such as age, gender, inherited genetic defects and skin type.
PATHOPHYSIOLOGY
Healthy tissues are composed of cells. Healthy cells have a specificsize, structure, function and growth rate that best serves the need of thetissues they compose cancer cells differ from normal cells in size structures,function and growth rate. These malignant cells lack the normal controls ofgrowth seen in the healthy cells, and grow uncontrollably. This uncontrolledgrowth allows the cancer cells to invade adjacent structure and then destroysurrounding tissues and organs. Malignant cells may also metastasize to otherareas of the body through the cardiovascular or lymphatic system.