Im taking tamoxifen for almost two years now because I was diagnosed with Breast cancer at 36. Anyway, I had an MRI done last week and they said my endometrial lining was 10mm thick. This test was done a couple of days after my period.  Is 10mm something I should be worried about?
10 mm thickening of endometrial thickening is clinically significant. I would suggest a diagnostic endometrial biopsy. Please discuss it with your oncologist and gynecologist.