Review on Cancer

The earliest evidence of cancer is found in the fossils of human mummies in ancient Egypt. In earlier days the cause of cancer was not certain hence people blamed the Gods if anyone was affected by cancer [1-5]. According to Hippocrates the human body had four fluids they are blood, phlegm, yellow bile and black bile. If the body fluids were balanced then the person was considered to be healthy. If the amount of black bile was more, it was considered as the cause of cancer [6-10]. In the earlier stages the cause of cancer was not confirmed. Many physicians have proposed many theories; few were Humoral theory, Lymph theory, Blastema theory, chronic irritation theory, Trauma theory and Infectious disease theory. Each theory had mentioned a different reason for the cause of cancer [10-20].