I’m not exactly sure of your question. It seems like you are asking, How does MaginProbe work or protect cosmetic aspects of cancer removal? I’m confused because you mention cosmetic outcomes and then provide information in your question about Dr. Kerry-Ann McDonald.
The MarginProbe according to the link you provided is used for lumpectomy (normally used to preserve the breasts as much as possible), so I think this is why you referred to how it protects cosmetically. The article says, “ The technology uses radio-frequency (RF) electrical fields to probe the tissue in order to identify any cancer that may be remaining on the surface of the tissue removed from the breast. If MarginProbe identifies cancer on the surface of the tissue the surgeon will remove additional tissue from the breast at the time of surgery.” It further goes on explaining that the goal of a lumpectomy is to remove cancerous tissue with a small rim or the normal tissues that surround it, which they call a margin. The MarginProbe is designed to provide more confidence that the doctors have removed all cancer from these margins during the procedure.
To answer your question to the best of my ability I would need more clarification on exactly what you are asking, but the procedure of a lumpectomy itself would be the main protection of cosmetic or appearance. This is because unlike a mastectomy they are taking away less of the breast during a lumpectomy. The MarginProbe might also leave less of a chance that unrequired surgery or removal would be done, if it’s claims on detecting cancer are accurate.
https://dilon.com/marginprobe/
According to a study done it did say that the MarginProbe could lead to less breast tissue being removed, but also did not have outstanding findings during their study. It further went on to say MP performance should be compared to pathology reports as well. This study was in the European Jouranal of Surgical Oncology and I viewed an abstract of the study on the website of ScienceDirect.
“MP cancer detection rate is relatively low while high false-positive rate leads to unnecessary shavings in almost all patients. Evaluation of MP performance should be based on comparing MP read to pathology report.”
https://www.sciencedirect.com/science/article/abs/pii/S0748798322001159#:~:text=MarginProbe%20enabled%20a%20change%20in,a%20reduction%20in%20pathology%20work.
I'm marking this as Can't be true or false, since you are asking how it protects and I have eplained that above. If you would like to clarify your question I would be happy to provide further information.
