Does Postevacuation β -Human Chorionic Gonadotropin Level Predict the Persistent Gestational Trophoblastic Neoplasia?

Area of Science:

• Gynecology
• Oncology
• Reproductive Medicine

Background:

• Gestational trophoblastic neoplasia (GTN) can arise after molar pregnancy.
• Early identification of persistent GTN is crucial for effective treatment.
• Beta-human chorionic gonadotropin (HCG) levels are monitored post-evacuation.

Purpose of the Study:

• To evaluate the predictive value of beta-human chorionic gonadotropin (HCG) regression after molar pregnancy evacuation for persistent gestational trophoblastic neoplasia (GTN).
• To identify reliable markers for early detection of malignant GTN in complete molar pregnancies.

Main Methods:

• A cross-sectional study involving 260 patients with complete molar pregnancy.
• Serum HCG levels were measured before treatment and weekly after evacuation until below 5 mIU/mL.
• Statistical analysis was performed to determine predictive cut-off points for HCG levels.

Main Results:

• HCG levels one and two weeks post-evacuation were identified as predictors of persistent GTN.
• The cut-off HCG level at two weeks post-evacuation showed the highest predictive value (AUC, 0.80; sensitivity, 79.82%; specificity, 71.64%).
• Pre-evacuation HCG levels and levels one week post-evacuation had lower predictive accuracy.

Conclusions:

• The rate of HCG level decrease at two weeks post-evacuation is the strongest predictive factor for progression to persistent GTN.
• This metric offers a reliable method for early identification of malignant GTN.
• Monitoring HCG regression is essential in managing patients with molar pregnancies.