Cancer: Cancer is a non-infectious, deadly disease that results in the uncontrolled growth of the tumor cells or cancer cells. About 20% of the world's total population suffers from cancer.  As technology develops, there are modern ways to diagnose and treat cancer in an efficient way.  Treatments:  Radiation therapy uses high-intensity radiations to kill cancer cells. Chemotherapy uses chemical drugs. Immunotherapy activates the body's immune system to fight against cancer cells. Stem cell treatment.  Diagnostics: Biopsy where a small tissue is taken and tested. Endoscopy where a thin camera is inserted into the body organs. Blood tests. Sputum and bronchial washing analysis use the sputum or bronchial sections to be analyzed.