J.S.
JT,
Congratulations on your ability to question your doctor! This is the first step to quality management of your health and your baby's!
Here is an article I thought might help you understand the issues better and make appropriate and informed inquiries:
http://www.mothering.com/articles/new_baby/breastfeeding/...
Mothering magazine is a natural family magazine with lots of good information you would never get from your convetional health providers.
The recommendations I found most interesting were:
1. Find a radiologist who is EXPERIENCED in reading mammograms of lactating breasts.
2. Bring very hungry baby with you and nurse immediately prior to the mammogram to drain the breasts. This seems like a GREAT idea. My breasts were always positively deflated after my daughter chowed down.
3. Continued breastfeeding actually REDUCES the risk of breast cancer by HALF!!!!!!!!!!!!!!!!!!! Does it make sense to remove the best preventative measure you have against breast cancer (extended nursing)?? Especially if there are ways to evaluate the lactating breast properly!
A separate Q&A in Mothering magazine stated other forms of evaluation may also be helpful such as ultrasound, MRI and CAT scan.
As far as where to go, I would go somewhere central and large, with a good reputation. I went to the breast imaging center at Presby Dallas (Walnut Hill and 75) and I must say, was very impressed with the facilities. Frankly, it felt like a spa. I would, however, ask questions about the names and experience level of the radiologists. Ask for evidence of experience in reading mammograms of lactating breasts. Maybe one of them actually did a journal article or research paper on the issue. Then if you are impressed with the background of someone in particular, request that person to read your films.
If you haven't found a lump, it may be that you don't need this at all right now. But if it is keeping you up at night, you may be better off going. You, of course, must make the decision you feel most comfortable with. Seek guidance from within your own heart and mind and follow those instincts.
Good luck!