At medical school, when would be doctors go through year of training to become medical professionals, they have to be able to recognise and diagnose a multitude of illnesses and ailments. Now to do such a thing they are allowed by the government to cut open human corpse or cadavars that had various illnesses or none at all when they died to see the internal workings of a human or how a disease ravages a body. For the section on random growths and self destructive diseases of the body, they must cut open a tumour. Even if I were to cut open a tumour and peer at its insides, I would still see less cancer than this post