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.
Tumor metastases are made up of the same types of cells as the original (primary) tumor. For example, if prostate cancer spreads via the bloodstream to the lungs, it is metastatic prostate cancer in the lung and is not lung cancer. The principal function of the lungs is to exchange gases between the air we breathe and the blood.