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Korean Journal of Obstetrics & Gynecology 2002;45(12):2219-2224.
Published online December 1, 2002.
Transvaginal ultrasonographic detection of fetal abnormalities in the first trimester.
You Mi Kim, Sung Sik Han, Hun Tack Woo, Moon Young Kim, Chun Hoe Ku, Chul Min Lee, Gyo Hoon Park, Yong Gyun Cho, Hoon Choi, Bok Rhyn Kim, Hong Gyun Lee
Department of Obstetrics and Gynecology, College of Medicine, Inje University, Sanggye Paik Hospital, Seoul, Korea.
Abstract
OBJECTIVE
The purpose of this study was to evaluate the efficiency of transvaginal ultrasonography for detection of fetal anomalies in first trimester. METHODS: This cohort included pregnant women between 9~14 weeks of gestation from April 2000 to April 2002 at department of Obstetrics and Gynecology, Sanggye Paik hospital, Inje university. Besides ACOG (1993) criteria, we scan nuchal translucency, FHR, cranium, abdominal wall and nuchal lesion using transvaginal sonography. If the anatomical survey was normal, the women underwent routine 18~24 weeks anomaly scans. RESULTS: 20 fetuses were identified as having 21 anomalies. Central nervous system anomaly (38%: 8/21) was the most frequent type of malformation. The other detected anomalies were isolated disorders of the lymphatic system 28% (6/21: two cystic hygromas and four nuchal edema), cystic hygroma associated with hydrops 14% (3/21), abdominal wall defects 14% (3/21), skeletal dysplasia 5% (1/21). Of the 20 fetuses that was diagnosed, 14 patients had elective first-trimester abortion, two had spontaneous fetal deaths, four were delivered at term. CONCLUSION: Besides offering the possibility of early termination, first trimester sonography has the advantage of identifying a transient sonographic sign, nuchal edema, which can be used as a marker in screening for fetal chromosomal abnormalities.
Key Words: fetal anomaly, first trimester, transvaginal sonography


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