Hi Letmein - sorry to hear about your bleeding but great news no malignancy. However that would be a long way down the road. Before that happens there are various stages that can occur with thickened endometrium called hyperplasia and this can be simple or complex and whether or not there are atypical cells. I would want to know how they classifed yours, if the lining was 13 mm? Simple hyperplasia without atypia is the least to worry about as far as I recall ( haven't looked this up recently).
I'm guessing that it was not complex with atypia as that maybe classified as pre-cancer?
I still don't know the risk of one type developing into another eg even with simple hyperplasia with normal cells - if left could it develop into one of the other more dangerous ones? These are the questions I would want to ask.
In your position I would actually want to thin the lining, after all whatever caused it to thicken may still happen? It could well be that as you are only 3 years post-menopause, the thickening could just be the result of residual ovarian activity without ovulation. Oestrogen falls rapidly during the approx 2 years following the last period and then reaches its lowest level, but I've always wondered what happens to it in terms of the effect on the endometrium and if it does thicken without being shed, whether it is gradually reabsorbed as the years go by?
Also if the thickened lining is causing the bleeding or spotting and this continues - this would be the result of leaving it, but you wouldn't necessarily need a Mirena fitted- for example you could take a course of progestogen eg norethisterone, then have a good bleed and then it would be thin again. Also I seem to remember reading that a longer course of norethisterone could lead to thinning of a thickened lining without bleeding. From ( poor) memory, 3 months might have been the length of time. This was on the of the HRT trials used to determine the effect of different progestogens - dose.duration I think, on the endometrium.
Presumably also the doc checked for fibroids, polyps etc and there was nothing abnormal that could have cause this bleeding?
You could also write a question to DR Heather Curry the owner/founder of this website and costs £30:
https://www.menopausematters.co.uk/contact-the-doctor.phpHope this helps.
Hurdity x