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Difficulty: MediumGynecologic Oncology

A 57-year-old woman presents to the gynecology clinic for evaluation of blood-tinged vaginal discharge. She first noticed the discharge on her undergarments three days ago. The patient underwent natural menopause at age 51. Her past medical history is significant for type 2 diabetes mellitus, hypertension, and hyperlipidemia. Current medications include metformin, lisinopril, and atorvastatin. She does not use hormone replacement therapy. Vital signs are within normal limits, and her body mass index is 34 kg/m². Speculum examination shows pale, thinned vaginal walls with a small amount of dark red blood pooled in the posterior fornix. The cervix appears flush with the vaginal vault and has no gross lesions. A transvaginal ultrasound is performed and demonstrates a heterogeneous endometrial stripe with a thickness of 9 mm. The adnexa are unremarkable bilaterally. Which of the following is the most appropriate next step in management?

  1. A
    Repeat transvaginal ultrasound in 3 months
  2. B
    Prescription of vaginal estrogen therapy
  3. Endometrial biopsyAnswer
  4. D
    Measurement of serum CA-125 level
  5. E
    Papanicolaou test and HPV cotesting

Answer

Endometrial biopsy
The correct next step is an endometrial biopsy. This patient presents with postmenopausal bleeding and significant risk factors for endometrial cancer, including obesity and type 2 diabetes mellitus (which lead to unopposed estrogen exposure). In the evaluation of postmenopausal bleeding, the primary goal is to rule out endometrial carcinoma. A transvaginal ultrasound showing an endometrial thickness greater than 4 mm is abnormal and mandates histologic evaluation. Therefore, obtaining tissue via an office endometrial biopsy is the most appropriate next step.

Step-by-Step Solution

1
Identify the primary clinical presentation.
The patient is a postmenopausal woman presenting with new-onset vaginal bleeding (blood-tinged discharge).
Postmenopausal bleeding is a classic red flag symptom that always requires prompt investigation to rule out malignancy.
2
Evaluate the patient's risk factors for endometrial cancer.
The patient has several significant risk factors, including obesity (BMI 34 kg/m²), advanced age, and type 2 diabetes mellitus.
Obesity and diabetes increase peripheral conversion of androgens to estrogens, leading to unopposed estrogen exposure which increases the risk of endometrial hyperplasia and carcinoma.
3
Interpret the diagnostic findings provided.
The transvaginal ultrasound (TVUS) shows an endometrial stripe of 9 mm.
In postmenopausal women, an endometrial stripe thickness of >4 mm on TVUS is considered abnormal and highly suspicious for endometrial hyperplasia or cancer.
4
Determine the most appropriate next step in management.
An endometrial biopsy must be performed.
Because the TVUS shows a thickened endometrium (>4 mm), a tissue diagnosis via endometrial biopsy is strictly required to definitively rule out endometrial carcinoma.

Key Concept

Any episode of postmenopausal bleeding must be thoroughly evaluated to rule out endometrial carcinoma. The initial workup typically involves either a transvaginal ultrasound (abnormal if endometrial stripe >4 mm) or an endometrial biopsy. If ultrasound shows a thickened endometrium, a biopsy is mandatory.
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Topics

Gynecologic Oncology

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