Thank you for your question. Breast lumps are not uncommon though their causes can be quite variable depending on your age, past medical history, family history, and exposures to various environmental agents. I suggest that you speak with your physician about the specifics of your medical record so that he or she may more accurately diagnose you. As you noted, cysts are a common cause of breast lumps. Sometimes, breast cysts can change in size with your menstrual period or they may remain the same size. Other potential causes of breast lumps are adenomas (benign tumors), breast abscess (an infection of the breast), or breast cancer (ductal or lobular carcinoma). Mammograms, breast ultrasounds, and breast MRI can help differentiate between these causes, and a tissue diagnosis through biopsy can confirm the diagnosis. Depending on your particular case, either or all of these steps may be indicated. Swollen lymph nodes may be reactive and secondary to inflammation, infection, or may be a sign of a more insidious process such as cancer. It is not possible to receive a diagnosis without being evaluated by a physician. If you are concerned and are unsure of your primary care doctor's diagnosis, you should consider a second opinion by either another doctors
">primary care physician or breast surgeon
, who is a specialist in breast lumps.