Could a 15 year old get breast couldcer?

Almost-never.: The statistical probability of getting breast cancer at 15 is lower than the odds of winning the lottery. Breast cancer rates increase the older you are, and are rarely seen before the 30's. However, if one has a palpable lump and/or a strong family history of breast or ovarian cancer, it is best to discuss with one's primary care doctor or gynecologist.

Quite rare: It is possible, there is a type of breast cancer called juvenile (or secretory) breast cancer that can occur in teenagers. However this is extremely rare and a new breast mass in a 15 year old is likely a fibroadenoma, cyst, or other benign lesion. Even some benign masses may need to be removed, so any new or enlarging breast mass should be evaluated by a physician.