Abnormal Uterine Bleeding in a Perimenopausal Woman
A 47-year-old G3P3 woman presents with heavy menstrual bleeding for 6 months. Her cycles are irregular, lasting 7-10 days with large clots. She complains of fatigue. She has no other medical problems and takes no medications. Exam: BMI 32, uterus slightly enlarged (10 weeks size), no adnexal masses. Labs: Hb 9.8 g/dL, ferritin 10 ng/mL. TSH normal. Pregnancy test negative. Pelvic ultrasound shows a 3 cm intramural fibroid and endometrial thickness of 12 mm.
1. What is the most appropriate next step in evaluation, and why?
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The most appropriate next step is endometrial biopsy to rule out endometrial hyperplasia or cancer. This patient is 47, perimenopausal, with abnormal uterine bleeding, obesity (BMI 32), and a thickened endometrial stripe (12 mm). These are risk factors for endometrial pathology. Although fibroids can cause heavy bleeding, the thickened endometrium and her age warrant sampling. A Pipelle biopsy can be done in the office. If insufficient, consider hysteroscopy with directed biopsy. Ultrasound also shows a fibroid, but that does not explain the thickened endometrium. So endometrial biopsy is essential.
2. If the biopsy shows benign proliferative endometrium, what are the treatment options for her heavy bleeding and anemia?
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Treatment options include medical and surgical management. First, treat anemia with iron supplementation. For bleeding, levonorgestrel-releasing intrauterine system (LNG-IUS) is first-line and highly effective. Other medical options: tranexamic acid during menses, NSAIDs, combined oral contraceptives (if no contraindications), or progestins (oral or depot). Since she has a fibroid, LNG-IUS may be less effective if the cavity is distorted, but it can still be tried. Surgical options: endometrial ablation (if she desires no future fertility and cavity is normal) or hysterectomy (if fibroids are symptomatic and she desires definitive treatment). Given her age and completed childbearing, LNG-IUS or ablation are reasonable. Hysterectomy is definitive but more invasive. She should be counseled about risks and benefits.