Dear gmurph: Cysts are, by definition, benign. They can vary from being quite small to very large. In general, there is no reason to aspirate them unless they are causing pain or discomfort or if you are just uncomfortable with it being there. As there is nothing on the mammogram or ultrasound that suggests anything other than a simple cyst, there is no reason to think differently. When you see the surgeon, you can discuss this further. If you are not comfortable, you might consider a second opinion from a breast specialist. These experts can usually be located at large academic medical centers.
So what I'm getting at is I think its great that they said it was a simple cysts on the ultrasound. My doctors have always said simple cysts are benign. I am also very lumpy. I think it's great that your doctor is being proactive in aspiring the cyst. It's best to be safe then sorry later.
Your doctor is just being careful. You cannot tell if something is cancer by just feeling it. If the radiology report also states that it is not suspicious of cancer that is very encouraging. I have read in these forums that some women do get big cysts and they hurt so they just have them aspired and thats the end of that. My breasts were always very tender before my period and I was always told I had cystic breasts. Sometimes when you are lumpy the doctors also just want to be double sure they don't miss anything. On me since they did find breast cancer, they did aspire a few cysts in both breast and all came back benign and these were simple cysts.
I was very fortunate that they found my cancer. It was very small .5mm and was hiding behind a cyst. I had no lymph involvement so lumpectomy and radiation and now on Tamoxifen. I was one of the lucky ones (if you want to call it that) that was diagnosed early. Try not to worry and let us know.
My concern is...how can you be positive that it is ONLY a cyst without having a biopsy of the fluid?