Answering your earlier question, hp; no, I've not seen any WG who's had a mastectomy.
I must confess, though, while I've never thought about visiting such a WG; I've often wondered about the more general issue of a WG suddenly having to cope with a diagnosis of breast cancer. I realise that, these days, not all breast cancers require a mastectomy, particularly if detected soon enough, but it must be a blow for a WG who's told that a mastectomy is required. I can't imagine that, when she's recovered from the surgery, she'll be optimistic about resuming her "career".