CMV igg positive - not igM.
Hi, have they discussed "chronic EBV"? That can also give a false positive for CMV.
CD3, CD4 and CD8 are found on "T-cells", which have as one of their jobs the killing of your own cells that have become infected with a virus (and also killing cancer cells).
Immunoglobulin G is made by B-cells, at times to attach to and neutralize viruses. But the immune system can get infinitely more complicated.
There seems to be something puzzling to them because you've had some fairly advanced tests. Is it that this has been going on for quite a while?
Well, just in case you aren't familiar (but you probably are): IgM is like the first prototype antibody, then after some trial and error, the improved IgG Ab's are custom manufactured en masse.
"Only cmv igg was positive."
Okay, that's the curious part then. Maybe your custom manufactured Ab's are not typical, and their binding ends (Fab portion) are configured so that they like the CMV more than the EBV? Just speculating. That'd be something like an error in the "class switching" process. EBV and CMV can have very similar little segments (epitopes).
Btw, offhand I don't know of any way that cancer can give all these various results together. But they have to at least consider cancer, because missing it would be disastrous.
If your mono was especially ferocious, that could point to an overactive immune system, IMO.