Sorry for the delay. Complex question. First part of answer is that in 13 years and after thousands of breast reconstructions, I do not have a single patient, that I can recall, who developed disease at her IMV dissection site after delayed breast reconstruction. So, there's some encouragement for you there. But, there are theories out there (no proof) that suggest surgery in an area where cancer cells that are present and not broken out into full growth may be stimulated somehow to begin to grow. Related to something we call the "Gompertz model" of tumor growth. That would mean that cancer was still there and not that the surgery made it appear out of no where.
In those who were a soft call on radiation or perhaps didn't have enough treatment to eradicate the disease completely this could be a conceivable scenario but in the U.S. breast cancer is often treated so aggressively that we don't see this kind of thing often or, as I mentioned, in my experience ever. That does not mean I won't see it someday, just that it is very unlikely.
So, if this is plausible, it would be applicable to any area in the breast/chest that could harbor residual disease, not just the IMV site.
Long story short, no good clinical data exists to prove it one way or the other and any surgery in an area where this could occur would be as likely as another to cause it.
Hope this helps some, very interesting question, I hope you find encouragement in my response,