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Korean Journal of Obstetrics & Gynecology 2002;45(4):593-601.
Published online April 1, 2002.
The study on the regression time and pattern of the serum beta-hCG in gestational trophoblastic disease.
Jung Kweon Kang, In Sang Ku, Jin Young Cha, Hun Young Cho, Hyun Hee Kim, Young Jae Kim, Soo Seock Ree, Eun Kyung Bae, Young Jeong Na, Kyung Tai Kim, Soo Hyun Cho, Sam Hyun Cho, Youn Yeung Hwang, Hyung Moon
Department of Obstetrics and Gynecology, College of Medicine, Hanyang University, Seoul, Korea.
Abstract
OBJECTIVES
It is now conventional practice to use human chorionic gonadotropin (hCG) as the marker of tumor activity in gestational trophoblastic disease (GTD). The interpretation of serial serum beta-hCG regression patterns is important in monitoring the course of the disease. The purpose of this study was to establish a regression time and pattern of the serum beta-hCG in which GTD is divided into hydatidiform mole and malignant trophoblastic disease. MATERIALS & METHODS: During the period from January 1990 through December 2000, 46 patients with GTD were histopathologically diagnosed and treated at the department of Obstetrics and Gynecology in Hanyang University Hospital. For the purpose of analysis and comparison, patients were divided into 19 cases of hydatidiform mole and 27 cases of malignant trophoblastic disease which was subdivided into nonmetastatic (17) and metastatic (10). Patients were followed clinically and by weekly estimations of quantitative serum beta-hCG until negative (<3 mIU/ml). After three consecutive negative beta-hCG, serum beta-hCG were drawn monthly in all patients for one year. The level of serum beta-hCG was detected by two-site sandwich immunoassay (Chiron Diagnostics Automated Chemiluminescence System 180). The obtained data were analyzed using t test and ANOVA test by SPSS. RESULTS: The incidence of the GTD compared with delivery was one per 182.7 deliveries. The mean value of serum beta-hCG regression time in hydatidiform mole was 12.8+/-1.1 (SEM) weeks (7.0-26.0 weeks) and 17.9+/-1.4 (SEM) weeks (8.0-34.0 weeks) in malignant trophoblastic disease. The regression time was significantly shorter in hydatidiform mole than that of malignant trophoblastic disease (P<0.01). The differences of mean value of serum beta-hCG regression time between the groups with nonmetastatic (18.0 weeks) and metastatic (17.8 weeks) were not statistically significant(P =0.946). The mean values of serum beta-hCG in both hydatidiform mole and malignant trophoblastic disease declined following a log-normal distribution. CONCLUSIONS: The regression pattern of serum beta-hCG in present study was similar to that of which in Western and also similar to that of which in Korea in 1980s. The present study supports the continued use of individual patients serum beta-hCG regression curve to make treatment decision and to recognize malignant trophoblastic disease promptly.
Key Words: Gestational trophoblastic disease, Hydatidiform mole, Malignant trophoblastic diseas, Human chorionic gonadotropin, Regression curve


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