1.   Differentiated thyroid cancer occurs much more commonly in women than in men, largely in the premenopausal years.

2.   Breast cancer occurs when cells in the breast run amok.

3.   Even removal of the ovaries is no guarantee that cancer will not occur.

4.   He found that lung cancer occurred more than twice as frequently among smokers as among nonsmokers.

5.   In some areas, thyroid cancer occurs hundreds of times more often than normal.

6.   Nor is it clear that cancers are occurring at a higher rate among former peacekeepers than in the population at large.

7.   Ovarian cancer can occur at any age, but often afflicts women in midlife, when symptoms can be mistaken for incipient menopause.

8.   Reardon said heart malignancy is very rare because most cancers occur in cells that replace themselves regularly, unlike cardiac cells.

9.   Rather, he said, most in the scientific community just believe detrimental genetic changes must take place before cancer occurs.