Dear Lactnetters, I am slowly weaning my third breastfed child, who is now four years old, and over the last few months I've noticed a tender left breast mass lateral to the nipple. I took antibiotics for seven days which seemed to help temporarily. The tenderness seems to increase around menstrual periods. My gynecologist feels a mobile lump and has ordered a mammogram for this Friday. She will consider ultrasound and/ or aspiration after the mammogram. My concerns are : 1. How conclusive is a mammogram in my situation and should I find a specialist familiar with the lactating breast to read it? 2. Could this be a galactocele, abcess, cyst or fibroadenoma, and how are these best diagnosed? I am interested in hearing from anyone who has experience with a situation like this. Thanks!! Karen Forsthoff BA IBCLC [log in to unmask]