Two years ago, when she was nine, Jamie Margulies noticed a lump on the left side of her chest, behind her nipple. She was scared, since her mom had recently been diagnosed with breast cancer. "I thought that since she had breast cancer, I would definitely get it," says Jamie, a 6th-grader who lives in Gladwyne, Pa.
To reassure her daughter, Jamie's mother took her to see her oncologist. The doctor examined her and set her mind at rest: The lump was not a cancer, but a breast bud -- a sign that her breasts were starting to grow.