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21 mm endometrial lining

A MyEndometrialCancerTeam Member asked a question 💭
Atlanta, GA
August 27
 · 
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A MyEndometrialCancerTeam Member

That is very thick.
I had a thick lining 5 years ago and underwent a hysteroscopy and D&C. I was premenopausal at that time.
Last year, now post menopausal, I was having minor spotting almost every day. I had an ultrasound and biopsy because the lining had thickened again. This time there was cancer.
Thank goodness we caught it early. I had a hysterectomy and luckily, that is my only treatment needed.
You need to get this checked out.

September 6
myEndometrialCancerTeam

Is a 21mm endometrial lining a cause for concern with endometrial cancer?

A 21mm endometrial lining is significantly thicker than what's considered normal, and it's something that definitely warrants close attention from a doctor. Here's a quick breakdown of what "normal" looks like after menopause:

- No vaginal bleeding Show Full Answer

Is a 21mm endometrial lining a cause for concern with endometrial cancer?

A 21mm endometrial lining is significantly thicker than what's considered normal, and it's something that definitely warrants close attention from a doctor. Here's a quick breakdown of what "normal" looks like after menopause:

- No vaginal bleeding: 8–11mm is generally considered within normal limits
- With vaginal bleeding: Less than 5mm is what doctors hope to see
- Over 11mm: Carries about a 7% risk of cancer
- Over 5mm with vaginal bleeding: Also raises cancer risk

At 21mm, this is well above all of these thresholds, which makes further testing really important. Doctors typically follow up with one or more of these tests to get a clearer picture:

- Endometrial biopsy – A small tissue sample is taken from the uterine lining and examined under a microscope
- Hysteroscopy – A thin tube with a camera is used to look directly inside the uterus
- Dilation and curettage (D&C) – A minor procedure where tissue is scraped from the lining for examination

If these tests haven't been discussed yet, it's worth bringing up with a doctor as soon as possible. A 21mm thickness is not something to wait on.

August 27

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