Save 25% on Ear Drops and premeasured dose pump Nasal Sprays with grapefruit seed extract! Made without gluten. Vegan.ave 25% on Ear Drops and premeasured dose pump Nasal Sprays with grapefruit seed extract! Made without gluten. Vegan.
By Mayo Clinic Staff. Cancer is caused by changes (mutations) to the DNA within cells. The DNA inside a cell is packaged into a large number of individual genes, each of which contains a set of instructions telling the cell what functions to perform, as well as how to grow and divide.
There are lots of ways for a cancer to cause death. Cancer in your digestive system can result in death by malnutrition. But chemotherapy can also cause death by malnutrition. Cancer in your lungs can cause death by asphyxiation, or by infection, like pneumonia that might not have killed you without the cancer.