Seeking medical care for an unexpected return of vaginal bleeding, a 71-year-old retired t… — USMLE Step 2 CK

Seeking medical care for an unexpected return of vaginal bleeding, a 71-year-old retired teacher arrives at the gynecology office. She reports noticing red spotting on her undergarments and toilet tissue over the past two weeks. The patient transitioned through menopause 20 years ago and has not experienced any vaginal bleeding since. Her past medical history is significant for well-controlled type 2 diabetes mellitus, essential hypertension, and obesity. Current medications include metformin and lisinopril. On physical examination, her blood pressure is $138/82 \text{ mmHg}$ , and her body mass index is $33 \text{ kg/m}^2$ . Speculum examination shows pale, dry vaginal walls without lacerations, but a small pool of dark blood is visible at the posterior fornix. Bimanual examination reveals a mobile, non-tender, anteverted uterus that is normal in size for her age. A transvaginal ultrasound is performed in the office, demonstrating an endometrial thickness of $11 \text{ mm}$ with cystic changes. The adnexa are unremarkable bilaterally. Which of the following is the most appropriate next step in the clinical management of this patient?

Endometrial biopsyAnswer
B
Repeat transvaginal ultrasound in 3 months
C
Magnetic resonance imaging of the pelvis
D
Initiation of topical vaginal estrogen therapy
E
Papanicolaou (Pap) test

Answer

Endometrial biopsy

The most appropriate next step for this patient is an endometrial biopsy. She presents with postmenopausal bleeding and possesses multiple risk factors for endometrial cancer, including unopposed estrogen exposure related to obesity, type 2 diabetes mellitus, and advanced age. Her transvaginal ultrasound reveals an endometrial thickness of

11 \text{ mm}

. In a postmenopausal patient, an endometrial stripe greater than

4 \text{ mm}

is considered abnormal and highly suspicious for endometrial hyperplasia or malignancy. Therefore, prompt histological evaluation via an outpatient endometrial biopsy is mandatory to establish a definitive tissue diagnosis.

Step-by-Step Solution

Identify the patient's primary presenting symptom and associated risk factors.

The patient is a 71-year-old postmenopausal woman with new-onset vaginal bleeding, obesity, and type 2 diabetes mellitus.

These factors place her at a significantly increased risk for endometrial cancer.

Analyze the results of the initial diagnostic imaging.

The transvaginal ultrasound demonstrates an endometrial thickness of 11 mm.

In postmenopausal women, an endometrial stripe thicker than 4 mm is considered abnormal and highly suspicious for underlying pathology.

Determine the appropriate clinical guideline for this presentation.

Guidelines dictate that abnormal postmenopausal bleeding combined with a thickened endometrial stripe requires direct tissue sampling.

An outpatient endometrial biopsy is the definitive first-line test to histologically diagnose or rule out endometrial hyperplasia and carcinoma.

Key Concept

Evaluation of Postmenopausal Bleeding

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