HEALTHY UNCERTAINTIES ABOUT BREAST CANCER.(MAIN)

Byline: ELLEN GOODMAN

BOSTON -- Some years ago, I was inducted into a special club. I hadn't applied for membership. I didn't want to join. I won admission the old-fashioned way: I inherited it.

After both my mother and my aunt were diagnosed with breast cancer, I automatically became a member of The High Risk Group. Today, I am happy to say that both these eightysomething women are alive and well, thank you very much. But my family membership entitles me to more than a casual interest in the disease that will afflict one in eight American women.

Every year, with a slight sense of foreboding and a bit of black humor, I go for what my friend and fellow club member calls ``the …