First of all I am sorry to hear that your aunt had breast cancer, although that is good news that her physician thinks that it is likely in remission. Remission is a term that physicians (or other people in the medical profession) to refer to the absence of disease activity within a patient in the setting of a chronic disease or illness
. It implies that there is a potential chance for recurrence (relapse), but doesn't tell anything about the chances of this occurring. I am assuming that in this case your aunts physician is unable to detect the cancer anymore, which is a very good thing. Depending on the disease process, in some cases when the patient has been in "remission" long enough, then we would start to talk about "cure". This is a difficult term to use when speaking of cancer however, because of our inability to very accurately predict if cancer will come back or not in any given individual. So to answer your second question, it doesn't strictly mean that she doesn't have the cancer anymore, it may just mean that it is so little that we can't detect it, or it is not "active". I hope that this information is helpful. For answers to questions like these, I would recommend that the two of you make an appointment with the physician that treated your aunt as they will be able to give you the most directed answers. Best of luck.