Fibroadenoma in 33 y old. report: oval, well circumscribed lesion 0.4 inch wide. birad 3. follow up 3 mths. no biopsy done. chance of being cancer?

It is a benign tumor: Fibroadenoma is a common condition among the young females. The diagnosis is frequently made on physical examination and confirmed with a mammogram. A biopsy is not required unless it starts to grow and increase in size. So you can watch it for 6 months up to one year and note any change in size and have a follow up visit with your doctor at least once yearly.