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Evaluating Endometrial Thickness With Ultrasound Part I

August 21, 2009
Written by: , Filed in: Obstetric Ultrasound
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Endometrial thickness is a key topic in ultrasound. A lot of sonograms are done to look at the endometrial thickness, particularly of post-menopausal women who are bleeding.

The measurement techniques that are used are endovaginal. This is not absolutely mandatory, but I personally would be very reluctant to draw professional conclusions without actually looking at an endovaginal scan.

In that measurement, you want to be sure that you identify this lucent band of tissue which represents the inner layer of myometrium.

So you want to measure from the edge of the bright reflector, to the opposite edge of the bright reflector that will constitute the endometrial thickness.

Evaluating Endometrial Thickness in Premenopausal Women

In normal premenopausal women, at the time around their menses or after their menses or after their menses is completed, their endometrium is thin usually in the 1 to 4 mm range.

As they work their way up towards ovulation and the proliferative phase, it generally measures from 4 to 8 mm.

Eight millimeters and after, they have ovulated and the endometrium becomes secretory, and it is up to 16 mm, it is still normal. So premenopausal women can have quite a thick endometrium without being abnormal

In part II we will look at evaluating endometrial thickness with ultrasound  in further detail.

Author: Roy A. Filly, MD
Excerpted from:
Diagnostic Imaging Review: For Residents, Fellows and Radiologists
Female Pelvis Section

Women’s and Breast Imaging

New York University Post-Graduate Medical School and the Department of Radiology This course is designed for the practicing radiologist with particular interest in women’s imaging and breast imaging. During the women’s imaging segment, the participating faculty will discuss each of the imaging modalities applied to obstetrical and gynecological imaging including ultrasound, MRI and CT. Practical and multimodality approaches to common imaging problems in the female pelvis will be emphasized, including imaging of the patient with pelvic pain, evaluation of adnexal masses and assessment of benign and malignant disorders of the uterus. Topics in obstetrical imaging will include requirements for the sonographic fetal anatomic survey, sonographic evaluation of obstetrical emergencies, normal and abnormal first trimester pregnancy and imaging pitfalls. The role of MR and CT in the evaluation of the pregnant patient will also be discussed. Click here to read more or order: Women’s and Breast Imaging
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