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.
Metastatic Cancer. In metastasis, cancer cells break away from where they first formed (primary cancer), travel through the blood or lymph system, and form new tumors (metastatic tumors) in other parts of the body. The metastatic tumor is the same type of cancer as the primary tumor.