I had my first mammogram on Fri and the reading came back saying "1.4 oval equal density mass in left breast us suspicious of malignancy." I then had an ultrasound and it said "1.2 oval mass with circumscribed margin in the left breast at 8 o'clock middle depth. The oval mass is hypoechoic." My BIRADS score is 4. Should I be worried, or is it possible fibroadenoma. I just had my biopsy yesterday. Also, I was wanting a clear understanding on hypoechoic. Thanks