Dear Dr My mother had some fibrocysts from almost 11 years ago and she is now 55 years old. She had some breast pain due to her fibrocysts and her and breast sonographies last mamography which was a year ago indicated that she has an almost larger cyst in her right breast. She also has a uterus fibroma that after her menopose it stopped growing. now she find out that her left breast is larger than the other and it is almost 3 months that she suffers from a slight pain in her left arm. We had not performed a breast sonography or mammography yet but I'm really concerned about it. Would you please tell me that what are the differential diagnoses for these symptoms?