This patient support community is for discussions relating to breast cancer, biopsy, genetics, chemotherapy, hormone therapy, lumps, lumpectomy, lymph node dissection, lymphedema, mammograms, mastectomy, radiation therapy, reconstruction, and self exams.
The fine needle aspiration report showed some atypical cells. The term "atypical cell" is used for the cell that is not similar to as a normal cell of that tissue should look.
This should not be much concern at the moment and the time for a strict follow up as per your doctor's suggestions has come.
There may be possibility of progression but it would be difficult to comment on the issue of progression to malignancy.