Which imaging modality is commonly used to evaluate endometrial thickness in postmenopausal bleeding?

Which imaging modality is commonly used to evaluate endometrial thickness in postmenopausal bleeding?

• A. Transvaginal ultrasound
• B. Pelvic X-ray
• C. CT scan
• D. MRI

Answer: (A)

Evaluating postmenopausal bleeding relies on measuring endometrial thickness with transvaginal ultrasound. Placing the ultrasound probe in the vagina yields high-resolution images of the endometrial stripe, which is essential in this setting because the endometrium is thin and precise measurement matters. If the endometrial thickness is above a certain threshold (commonly around 4–5 mm), it raises concern for pathology such as hyperplasia or cancer and typically prompts tissue sampling, whereas a thin, atrophic endometrium is less concerning in the absence of ongoing bleeding or other risk factors. Transvaginal ultrasound is preferred because it is quick, accurate for soft tissue detail, and does not involve radiation. Other imaging methods—pelvic X-ray, CT, or MRI—can visualize pelvic structures but do not provide the reliable, routine measurement of endometrial thickness that guides initial management in postmenopausal bleeding, and they are generally reserved for other diagnostic purposes or when ultrasound results are inconclusive.

Evaluating postmenopausal bleeding relies on measuring endometrial thickness with transvaginal ultrasound. Placing the ultrasound probe in the vagina yields high-resolution images of the endometrial stripe, which is essential in this setting because the endometrium is thin and precise measurement matters. If the endometrial thickness is above a certain threshold (commonly around 4–5 mm), it raises concern for pathology such as hyperplasia or cancer and typically prompts tissue sampling, whereas a thin, atrophic endometrium is less concerning in the absence of ongoing bleeding or other risk factors.

Transvaginal ultrasound is preferred because it is quick, accurate for soft tissue detail, and does not involve radiation. Other imaging methods—pelvic X-ray, CT, or MRI—can visualize pelvic structures but do not provide the reliable, routine measurement of endometrial thickness that guides initial management in postmenopausal bleeding, and they are generally reserved for other diagnostic purposes or when ultrasound results are inconclusive.