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Difficulty: HardGynecologic Oncology

A 24-year-old primigravida at 10 weeks gestation presents to the emergency department with heavy vaginal bleeding and severe vomiting. Her blood pressure is 150/90 mmHg. Pelvic examination reveals a uterus sized consistent with a 16-week gestation. Transvaginal ultrasonography demonstrates a heterogeneous, complex intrauterine mass with multiple cystic spaces and no fetal parts. Quantitative serum β\beta-hCG is 250,000 mIU/mL. Assuming this patient's clinical course subsequently progresses to non-metastatic gestational trophoblastic neoplasia, arrange the following management and surveillance steps in the optimal chronological order.

  1. 1Perform suction dilation and curettage
  2. 2Monitor quantitative serum β\beta-hCG levels weekly
  3. 3Perform staging with chest radiography and pelvic ultrasonography
  4. 4Administer single-agent methotrexate therapy
  5. 5Monitor quantitative serum β\beta-hCG levels monthly for one year

Answer

The correct chronological sequence is: Suction dilation and curettage, followed by weekly β\beta-hCG monitoring, staging with chest radiography and pelvic ultrasonography, single-agent methotrexate therapy, and finally monthly β\beta-hCG monitoring for one year.
The correct clinical pathway for a complete hydatidiform mole begins with surgical evacuation via suction dilation and curettage. Because approximately 15% of complete moles progress to gestational trophoblastic neoplasia (GTN), weekly quantitative serum β\beta-hCG monitoring is mandatory following evacuation. If GTN develops (diagnosed by rising or plateauing β\beta-hCG levels), the patient must undergo staging (chest radiograph and pelvic ultrasound, plus or minus brain/abdominopelvic imaging if symptomatic) to calculate the WHO prognostic score. For non-metastatic, low-risk GTN, single-agent chemotherapy (such as methotrexate or dactinomycin) is the standard of care. Following successful treatment (defined by three normal weekly β\beta-hCG levels), the patient enters a surveillance period of monthly β\beta-hCG checks for 12 months, during which strict contraception is required.

Step-by-Step Solution

1
Identify the primary presentation and immediate management
Complete hydatidiform mole requiring immediate uterine evacuation via suction dilation and curettage.
To treat the primary molar pregnancy and prevent severe immediate maternal complications (preeclampsia, hemorrhage, thyroid storm).
2
Establish early post-evacuation surveillance
Initiation of weekly β\beta-hCG monitoring.
Approximately 15-20% of complete moles undergo malignant transformation; weekly trending is the standard of care to detect GTN early.
3
Respond to malignant transformation (GTN diagnosis)
Staging imaging (chest radiography, pelvic ultrasound).
To rule out distant metastasis (commonly to the lungs) and calculate the WHO prognostic score prior to initiating chemotherapy.
4
Initiate targeted therapy based on prognostic staging
Single-agent methotrexate therapy.
The patient has assumed non-metastatic (low-risk) GTN, which is highly curable with single-agent chemotherapy regimens.
5
Establish long-term post-treatment surveillance
Monthly β\beta-hCG monitoring for one year.
To confirm a durable remission and detect any early recurrences while the patient remains on strict contraception.

Key Concept

Management pathway for Gestational Trophoblastic Disease (GTD) and Neoplasia (GTN)
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Topics

Gynecologic Oncology

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