3. Carcinogen - an agent known to cause cancer.

12. 1

13. 2

14. 3

17. MM is the most serious form of skin cancer. Even so, if diagnosed and removed while it is still thin and limited to the outermost skin layer, it is almost 100% curable.

18. Insitu melanomas occupy only the upper-most part of the epidermis, the top layer of skin.

19. Invasive melanomas are the most serious kind...

20. Invasive melanomas have penetrated deeply into the skin spread to other parts of the body.

25. Treatments

26. Surgery The tumor is removed, along with a margin of cancer-free skin.

27. Chemotherapy Reaches cells all over the body and destroys cancer cells that may have traveled from the primary tumor.

28. Radiation Therapy Directed application to destroy cancer cells in a specific area of the body.

29. Immunotherapy Strengthens the body's own immune system to attack the cancer cells.