This is an important question to discuss with your primary care doctor
, or whichever doctor ordered the mammogram and ultrasound. As your doctors may have told you already, the BI RADS system is a formal grading system that is used by radiologist
to help determine how likely breast masses that are visualized with mammography are to be cancerous.BI RADS 4 is a category which contains abnormalities which are at least potentially not benign. For this reason, it is important to have a biopsy of virtually all BI RADS 4 category masses.
Similarly, it sounds like, based on your question, you have also had an ultrasound of the mass in addition to a mammography. The ultrasound also shows some characteristics of the mass (such as lobular nature) that are also potentially concerning.
In short, both the mammogram and the ultrasound suggest that you need to proceed to a biopsy. Although there is a good chance that the mass is not cancerous, it is important to find out for certain. Please talk to your primary care doctor about this, or which ever other doctor ordered the mammogram and ultrasound. They should be able to make a referral for you to a surgeon
who can perform the biopsy. Based on what the biopsy results show, your doctors will be able to tell you what to do next!