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Threshold for endometrial sampling among postmenopausal patients without vaginal bleeding.

Michelle Louie1, Timothy P Canavan1, Suketu Mansuria1

  • 1Department of Obstetrics and Gynecology and Reproductive Sciences, Magee-Womens Hospital, Pittsburgh, PA, USA.

International Journal of Gynaecology and Obstetrics: the Official Organ of the International Federation of Gynaecology and Obstetrics
|December 15, 2015
PubMed
Summary

For postmenopausal women with incidentally found endometrial thickening over 4mm and no vaginal bleeding, a thickness below 15mm may not require endometrial biopsy sampling, reducing unnecessary procedures.

Keywords:
AsymptomaticBiopsy samplingEndometrial cancerEndometrial hyperplasiaIncidentalPostmenopausalThickened endometrial lining

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Area of Science:

  • Gynecology
  • Oncology
  • Radiology

Background:

  • Postmenopausal women with incidentally detected endometrial lining >4mm require careful evaluation.
  • Vaginal bleeding is a primary indicator for endometrial assessment, but incidental findings necessitate defined thresholds.

Purpose of the Study:

  • To establish an optimal endometrial thickness threshold for recommending endometrial biopsy in asymptomatic postmenopausal women with incidentally found endometrial lining >4mm.
  • To reduce unnecessary invasive procedures by identifying a safe cutoff for endometrial sampling.

Main Methods:

  • Retrospective cohort study of 462 postmenopausal women (≥50 years) with endometrial lining >4mm, identified via pelvic ultrasonography for non-bleeding indications.
  • Logistic regression analysis to correlate endometrial thickness (4-20mm) with the probability of endometrial carcinoma and atypical hyperplasia.

Main Results:

  • Endometrial thickness ≥15mm was significantly associated with endometrial carcinoma (OR 4.53, P=0.03), with a negative predictive value of 98.5%.
  • Endometrial thickness ≥14mm was associated with atypical hyperplasia (OR 4.29, P=0.02), with a negative predictive value of 98.3%.
  • The overall risk of cancer in the studied group was 0.06%.

Conclusions:

  • An incidentally detected endometrial thickness <15mm in postmenopausal women without vaginal bleeding may not necessitate endometrial biopsy, regardless of other risk factors.
  • This finding supports a less invasive approach for managing incidental endometrial thickening in asymptomatic postmenopausal women.