No experience but have been involved in meno issues personally and professionally (writing about them as a medical author.)
I'd like to know why the hysterectomy now . have you been clear of any cancer for 11 years (and it was borderline anyway.)
what's taken you back to the oncologist now?
What I have learned after talking to several gynaecologists as part of my work is that there are as many opinions as there are consultants, almost.
It seems a bit drastic to have this op if you are well now.
Most consultants would advise you to hang onto your ovary unless there is a clear sign of disease. They continue to produce small amounts of estrogen for life.
If you have the op, you will need estrogen for life perhaps, which is fine, the risks of HRT do not apply to estrogen-only.
You may also need testosterone at some point- the 'women's dose' .
An implant has the drawback that you cannot alter the dose once it's in place.
I have read here and on other forums that many women are happy with Oestogel ( a gel) which I have used for 11 years myself, post menopause.
Do you have private medical insurance and if so, are you able to travel anywhere for a 2nd opinion, or pay for 1 appt with another consultant?