Mammograms have their limitations. Perhaps you should take your MD's advice and have it checked after a few months.
Hi,
I think that you should be pressing to have a biopsy. If the lump can be felt and it's a cyst, a needle biopsy FNA ( Fine Needle Aspiration) will make it collapse and no further treatment will be necessary.If the lump is a solid one, the needle can sample it so that the cells extracted can be examined by a pathologist .In my opinion if there's a lump there, it really doesn't matter what the mammogram or ultrasound show. A lump is a lump and needs to be either carefully watched if you and your Doctor are comfortable with that approach, or have this palpable lump biopsied.
The fact that this lump is palpable but does not show on radiology, does not make it cancerous or increase the chances of it being cancerous.
Another option would be to have an MRI test ,which is a very good tool to detect an abnormality when one has dense breast.
You may discuss with your Doctor about these different options and see what he/she recommends.
Best wishes