Principals of Cancer

5. in all types of cancer, cells ______ slightly and replicate uncontrollably
7. chemical or environmental agents that have been identified as cancer causers
9. the growth of blood vessels to supply a tumor
12. mutated cells ___________ without control, often piling up into distinct masses called tumors
13. the natural, healthy process of programmed cell death
16. therapy given to cancer patients who are not likely to survive
18. most commonly used system for staging cancer
19. a gene that initiates malignant characteristics within a cell

1. when cancer cells break off of the primary tumor and travel to new areas
2. percent of americans who will be diagnosed with some type of cancer in their life
3. therapy used as an intervention after the main treatment is complete
4. cancers of the blood and lymph, which do not usually involve solid tumors
6. some _________, such as viruses, bacteria and animal parasites, have been determined to cause certain types of cancer
7. when cancer cells land in a new target tissue and begin metastasis all over again
8. therapy used as an intervention before the main treatment begins
10. most commonly diagnosed type of cancer
11. oncogene __________ is the beginning of the changes that cause certain cells to become malignant
14. original malignant cells begin in muscle or connective tissue
15. mutation begins in epithelial cells
17. type of cancer with the highest mortality rate