In the human body, there are thousands of cancer cells generated every day, even for a wholesome human being. Fortunately, not all of us have cancer as our immunocytes can get rid of those cancer cells. When healthy, immunity is stronger than cancer and on the other hand, when unhealthy, cancer prevails, in which case part of cancer cells that have survived begin to proliferate and ultimately cause cancer.
By means of PETCT or other examinations, the early-stage cancer that can be identified is approximately 1cm in size, 1g in weight and contains around 1 billion cancer cells. For cancer, it usually takes 10 years from occurrence to the moment of discovery, and that is why periodical cancer-related physical examination is recommended.