Causes of Cancer 1) Genes (the DNA type)   : damages or mutations of DNA results in cancer 2) Carcinogens: these are cancer causing substance that damage DNA thereby getting cancer 3) Genes (the family type): cancer can be caused by heredity 4) Other medical factors   :may be ages or by some virus  #Cancer #CancerTreatments #Calicut #Kerala #India #Treatments #Chemotherapy