title: [Survey of gestational trophoblastic disease incidence among 3.6 million pregnancies in China].
abstract: OBJECTIVE
  To survey incidence of gestational trophoblastic disease (GTD) in China and to provide useful information for prevention and better treatment of the disease.
  
  
  METHODS
  The survey was retrospectively carried out from 1991 to 2000 and included 143 hospitals in the following seven Chinese provinces: Zhejiang, Jiangsu, Fujian, Anhui, Jiangxi, Shanxi and Henan.
  
  
  RESULTS
  Excluding incomplete data, data from 118 hospitals from seven provinces were finally analyzed. The total numbers of pregnancy and GTD were 3,674, 654 and 14,222, respectively. The GTD cases occurred mainly among 20 - 34 year old women, which accounted for 85.5% of total GTD. The incidence of GTD was 3.87 per thousand. There were 9,194 cases (64.6%) of hydatidiform, 3,452 cases (24.3%) of invasive mole, 1521 cases (10.7%) of choriocarcinoma, 55 cases (0.4%) of placenta-site trophoblastic tumor, respectively.
  
  
  CONCLUSIONS
  The results of this survey are reliable and representative due to large sampling and hospital-based data collection. The incidences of GTD decreased significantly compared with 1950s'. It is important to take pathological examination for GTD and to diagnose complate mole and partial mole correctly.
authors.affiliation: Department of Gynecology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China.
authors.forename: Yi-fu
authors.initials: YF
authors.lastname: Shi
authors.forename: Juan-qing
authors.initials: JQ
authors.lastname: Li
authors.forename: Wei
authors.initials: W
authors.lastname: Zheng
authors.forename: Xue-jun
authors.initials: XJ
authors.lastname: Chen
authors.forename: Yu-huan
authors.initials: YH
authors.lastname: Qiao
authors.forename: Min
authors.initials: M
authors.lastname: Hao
authors.forename: Chong-wan
authors.initials: CW
authors.lastname: Zhou
authors.forename: Ya-li
authors.initials: YL
authors.lastname: Hu
authors.forename: Gui-mei
authors.initials: GM
authors.lastname: Wan
authors.forename: Yu-cheng
authors.initials: YC
authors.lastname: Sha
authors.forename: Xiu
authors.initials: X
authors.lastname: Zheng
mesh_terms: D000328:Adult; D002681:China / Q000453:epidemiology; D002822:Choriocarcinoma / Q000175:diagnosis / Q000453:epidemiology; D005260:Female; D031901:Gestational Trophoblastic Disease / Q000175:diagnosis / Q000453:epidemiology* / Q000517:prevention & control; D006801:Humans; D006828:Hydatidiform Mole / Q000175:diagnosis / Q000453:epidemiology; D015994:Incidence; D011247:Pregnancy; D012189:Retrospective Studies; D018245:Trophoblastic Tumor, Placental Site / Q000175:diagnosis / Q000453:epidemiology; D014594:Uterine Neoplasms / Q000175:diagnosis / Q000453:epidemiology*