Hi,
Glands in the breast or lymph nodes can swell (or dilate) for a variety of reasons,mostly are benign in nature and could be an indication of an infection or inflammation somewhere in the body.The cause of the swelling would determine the treatment options.Testings such as mammograms,ultrasounds and perhaps a biopsy, if recommended by her doctor, can help differentiate a benign problem from a serious one.
Your doctor will be best able to explain to you and to your wife the results of all the tests that have been done and the proper course(s) of action.
Best wishes...
Get back to me when she has seen her doc....I can be very helpful if she is diagnosed with BC. It is a totally survivable disease, even in late stage, and there is tons of information and support available.
Let me know....