Panorama of Cancer

Cancer is still an unsolved puzzle. There are many theories, but none can predict with precision when and why somebody would suffer from cancer? In 60% cases, the newly diagnosed cancer occurs in people who are 65 years old or above. Some critical factors are gene aberration, DNA metabolism, microsatellite instability in haemopoietic stem cells, life style, etc. But the list is not exhaustive. Sometimes there are some alarm signs, but in other times, it could be non-specific symptoms.