May 22, 2022 05:02AM veeder14 wrote:

Hi eauclaire

My uterine lining was 2mm when I started Tamoxifen and 17 mm 4 months later. I wasn’t taken off of Tamoxifen but had a hysterectomy so I could continue taking it. I was 61 and post menopausal at that time. I didn’t want to switch to AL medication instead.

sounds like your lining is getting thicker but no where near how quickly mine did. I just know my lining thickness was out of control. Why would you need a biopsy? Are you having bleeding? Let us know what your Oncologist recommends

May 22, 2022 11:30PM rain88 wrote:

I was peri-menopausal before starting on Tamoxifen, and after 15 months on it, I had a massive bleeding. The vaginal US showed a 24 mm thickened uterus, but in turned out it was a large - benign PHEW! - endometrial polyp. My MO did take me off Tamoxifen though, and advised to stay off it.

May 29, 2022 03:14PM - edited May 29, 2022 03:16PM by pinger2474

Thanks Rah for your well wishes. Since the ultrasound which uncovered 14mm lining, I ended up getting a very heavy period after not having a period in 8 months and another period the following month. So even though I'm going to be 56 this year I am clearly not going into menopause. Would having a period decrease the lining?

I did end up getting a uterine biopsy which was interesting because the gynecology oncologist couldn't see the cervical polyp that my regular gynecologist mentioned. Maybe it detached with the heavy period? They did find a benign endometrial polyp which I am planning to have removed soon. Rain, I did ask about whether I should stop my Tamoxifen usage which is only 5mg a day but both. MO and GO said no. Are you on something else? Hope you are doing well. We have the same type of BC, mucinous.

Hope everyone is staying safe and healthy.

May 30, 2022 05:36AM rah2464 wrote:

Pinger - the heavy period should shed the uterine lining but I would plan on a follow up pelvic ultrasound since you had a clean biopsy and you are continuing on the tamoxifen. I would think your GO would have that it the plan as an annual check.

My D&C is Wednesday will be so glad to get it done and determine if I have an issue or not. My MO has already pulled me off the Tamoxifen. I will get my original tumor tested early (at four years not five) to see if I need to try an AI.

Jun 3, 2022 05:01AM rah2464 wrote:

Thank you so much ladyc2020 ! My results posted late yesterday and thankfully all benign. I was anticipating some dysplasia but all clear whew! Thankful it won't be a hysterectomy summer.

It will be interesting to see where my post op discussion goes given the level of irritation in my uterus.