I think you misinterpreted my earlier post.
I also, as the only person even remotely connected to medicine amongst my family and friends, am often asked to interpret notes and medical records. Patients obviously get 2nd, 3rd or even more opinions all the time and they should be encouraged to do so.
I have no problem with the OP assisting his family member in understanding her medical records. My point #3 was that in no way should be participate in obtaining medical records in which his name will be logged. Once the OP has his name associated with that patient's medical records, he could now potentially be seen as her medical provider, with all the risk that entails.
My comment was simply meant to state the above and that he should not participate in obtaining her medical records for her. She or her PCP should be able to do that and then the OP can then review them. I also regularly provide patients with copies of their studies I order, their pathology, etc and review them with them.
Until the OP posts again we have no way of knowing what her "concern" is. It is certainly possible that by concern she means "confused", doesn't understand her treatment goals. Unfortunately, I have found that assuming the worst, that "concern" also means "I think they are doing something wrong and want my records to prove that and maybe even talk to an attorney". THAT is what I think the OP needs to stay far away from. As an intern, it is unlikely that he possesses the detailed knowledge of oncologic practices required to fully understand her medical records either.
I don't know if that makes sense, but some information about the OP's relatives motives is probably important. I guess I am also unclear as to why she cannot get those records herself and needs to involve him. I realize she doesn't understand how these things work and doesn't realize that looking at her medical records can get him in trouble, but really...how about asking her PCP to get the records and review them with her, or having the relative go over to medical records and get them herself?