[Lani]

there is such a thing as post radiation fibrosis as well as an entity called fat necrosis which can calcify

The former responds to trental+vitamin E (French trials have confirmed, even rather late after they have occurred) the latter has a distinct appearance on mammogram.

There is also something called heterotopic ossification which is usually a post traumatic problem, often in a muscle after, for example a bad contusion against a steering wheel.

Perhaps if you go to google and pubmed and research these terms you may be able to formulate something to ask the doctors.

None of these are dangerous or make metastasis more likely as far as I can discern, just a "pain in the .....breast"!

Hope this helps