I had a diagnostice mamogram and ultrasound, upon which the radiologist recommended a biopsy. In the report the mass is described as 1.7 cm mass with circumscribed margins and a central fatty hilum with blood flow seen in the hilar region. It has features suggestive of a lymph node although this in not definitive. Do other lesions look like a lymph node? If it has a fatty lesion, it is generally considered benign, correct? Why would the radiologist order a biopsy without a trial on antibiotics to see if I had some type of infection, or schedule a follow up mamogram in 6 months to see if it was still there? It appears from everything I have read, what he is describing is a lymph node. I am just unsure why he would give a BIRAD of 4, and recommend a biopsy when the entire description is of a lymph node, and from other information I have read it can be normal to have a lymph node of up to 2 cm in size.