First, my sympathies for your wife, I wish the best outcome for you both. Second, please do not take any of the following for medical advice, I intend to speak generally.
I mostly said moderately differentiated, because for a lot of pathologists, if you give us a three tiered system for grading some type of cancer (and there are systems for almost every type of cancer) that we'll put most things in the middle. I personally believe two tiered systems work better for most everything. Most studies have shown that breast cancer scoring (in the US, most use the Nottingham modification of the Bloom-Richardson system) is only moderately reproducible anyways [1][2]
I tend to only fully grade the tumor after it has been resected, because there is not much point in grading it on the biopsy (ie. it won't change management, most patients are still going to have surgery) since sampling error may influence the final grade if you are discrepant from the biopsy.
I always tell friends and family that if they have any medical procedures, and most especially those for cancer, to always get copies of the operation note and the final pathology interpretation. The operation note will be written by the surgeon and will detail everything she did during the operation, what was removed, what was placed, etc. The final pathology will be the best place to get detailed information about what the tumor, where it is, the pathologic stage, etc. Your discussions with all of the other doctors will all basically be dictated by this report. There may be multiple of them, one for each procedure. So get the biopsy pathology report, the pathology report from the mastectomy, etc. They should also report out the results of the ancillary testing to (ER/PR/Her2) since they are the ones who did them. Most of the cancer reports (in the US anyways) should be written in accordance with the protocols from our professional organization and can be found online [3]. You'll probably find them somewhat tedious, but there is a wealth of information in there [4]. You are entitled to those reports and you really owe it to yourself to get a copy. If your doctor/doctor's staff won't get you one, then you could contact the pathology group directly to obtain one, don't hesitate.
In general, the grade of the tumor is far, far less important than stage of the tumor at diagnosis (most importantly the status of the axillary lymph nodes) and also the ER/PR/Her2 status of the tumor.
I mostly said moderately differentiated, because for a lot of pathologists, if you give us a three tiered system for grading some type of cancer (and there are systems for almost every type of cancer) that we'll put most things in the middle. I personally believe two tiered systems work better for most everything. Most studies have shown that breast cancer scoring (in the US, most use the Nottingham modification of the Bloom-Richardson system) is only moderately reproducible anyways [1][2]
I tend to only fully grade the tumor after it has been resected, because there is not much point in grading it on the biopsy (ie. it won't change management, most patients are still going to have surgery) since sampling error may influence the final grade if you are discrepant from the biopsy.
I always tell friends and family that if they have any medical procedures, and most especially those for cancer, to always get copies of the operation note and the final pathology interpretation. The operation note will be written by the surgeon and will detail everything she did during the operation, what was removed, what was placed, etc. The final pathology will be the best place to get detailed information about what the tumor, where it is, the pathologic stage, etc. Your discussions with all of the other doctors will all basically be dictated by this report. There may be multiple of them, one for each procedure. So get the biopsy pathology report, the pathology report from the mastectomy, etc. They should also report out the results of the ancillary testing to (ER/PR/Her2) since they are the ones who did them. Most of the cancer reports (in the US anyways) should be written in accordance with the protocols from our professional organization and can be found online [3]. You'll probably find them somewhat tedious, but there is a wealth of information in there [4]. You are entitled to those reports and you really owe it to yourself to get a copy. If your doctor/doctor's staff won't get you one, then you could contact the pathology group directly to obtain one, don't hesitate.
In general, the grade of the tumor is far, far less important than stage of the tumor at diagnosis (most importantly the status of the axillary lymph nodes) and also the ER/PR/Her2 status of the tumor.
[1] http://www.ncbi.nlm.nih.gov/pubmed/15920556
[2] http://www.ncbi.nlm.nih.gov/pubmed/7856562
[3] http://www.cap.org/apps/cap.portal?_nfpb=true&cntvwrPtlt...
[4][pdf] http://www.cap.org/apps/docs/committees/cancer/cancer_protoc...