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sonography must be performed in order to evaluate associated anomalyof heart, vertebra, gastrointestinal tract or other organs.

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Extrarenal anomalies associated with fetal renal dysplasiaChoi SJ, Kim YH, Choi JY, Song SY, Kim SA, Song CH, Jung H,Department of Obstetrics and Gynecology, Chosun Universityhospital, Korea; Department of Radiology, Chosun Universityhospital, Korea

Objectives: The fetal renal dysplasia is relatively easily detectableanomalies in antenatal sonography. The purpose of this study is toevaluate other anomalies associated with the fetal renal dysplasia.Methods: This was a follow-up study of fetal renal dysplasia detectedantenatally in level II sonography between 1998 and 2005. Thirty-onefetuses who have fetal renal dysplasia detected by antenatal sonographywere evaluated after delivery and termination. We excluded the casesof hydronephrosis and contralateral renal pelvis dilatation.Results: There were two cases of polycystic kidney, four cases ofbilateral renal agenesis, four cases of unilateral renal agenesis, threecases of bilateral multicystic dysplastic kidney and 18 cases of unilat-eral multicystic dysplastic kidney. The most common associated anom-aly was congenital heart disease (eight cases). Single umbilical arterywas seven cases, imperforate anus was four cases, tracheo-esophagealfistula was two cases. Other anomalies were contralateral renal corticaldysplasia, contralateral pelvic kidney, hypospadia and scoliosis withhemivertebra.Conclusions: Fetal echocardiography must be performed in order toevaluate associated cardiac anomaly if fetal renal dysplasia is detectedantenatally by sonography.

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Intrauterine diagnosis and management of congenital goitroushypothyroidism in one of dizygotic twin pregnancyLee PR, Won H-S, Shim J-Y, Kim A, University of Ulsan College ofMedicine, Asan Medical Center, Seoul, Korea

We present a case of fetal congenital goitrous hypothyroidism in one ofdizygotic twin pregnancy. A routine ultrasound examination at 20weeks of gestation revealed a bilobed large fetal neck mass in the firsttwin. There was neither other abnormal finding nor polyhydramnios.Cordocentesis was performed to evaluate fetal thyroid function andcongenital hypothyroidism was confirmed. The other fetus was normal.We administered intra-amniotic thyroxin (200 ug) injection three times,at 23, 24 and 25 weeks. Follow-up cordocentesis revealed euthyroidstatus; although the thyroid gland had decreased in size, it was stillgoitrous. The mother was proved to have subclinical hypothyroidismand started synthroid treatment. At 36 weeks of gestation, PPROMoccurred and the twins were delivered vaginally. The first twin wasproved as an euthyroid status with no need for further treatment.

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Harlequin ichthyosis misdiagnosed as bilateral cleft lip onprenatal sonography in a twin conceived by in vitro fertilizationPark Y-N, Moon S-O, Kim HA, Choi S-J, Oh S-Y, Kim J-H, SamsungMedical Center Sungkyunkwan University School of Medicine, Korea

Objectives: Harlequin ichthyosis is a severe and fatal form of congen-ital ichthyosis and has an autosomal recessive inheritance.Methods: We report a case of harlequin ichthyosis misdiagnosed asbilateral cleft lip on prenatal sonography in a twin conceived by IVF.Results: Case: A 36-year-old women, with twin pregnancy, who con-ceived by IVF was referred. The ultrasound performed at 28 weeksgestation suspected bilateral cleft lip and palate, rocker bottom feet and

hydronephrosis in left kidney in fetus A. Because her pregnancy wascomplicated by PPROM at 34 weeks of gestation, emergency Cesareansection was done and the neonate A was found to have severe ichthy-osis involving whole body with large plaques of hyperkeratotic skin onpalms and soles, and the neonate B was normal. The neonate A had aflat and hypoplastic nose, a large mouth that was widely gaping open,an ectropion, abnormal fixed position of the hands and edema of thighsand feet.Conclusions: Here we present a harlequin ichthyosis case misdiag-nosed as bilateral cleft lip on 2D ultrasound. Because this lethalcondition is inherited by autosomal recessive trait, molecular gene testand meticulous ultrasound examination in 3D as well as conventional2D should be offered at her next pregnancy.

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Clinical application and usefulness of multi-slice view in fetalechocardiographyWon H-S, Kim S-K, Shim J-Y, Lee PR, Kim A, University of UlsanCollege of Medicine, Asan Medical Center, Seoul, Korea

Objectives: To introduce the clinical application and usefulness ofmulti-slice view (MSV) for screening of fetal heart anomalies.Methods: We performed prenatal ultrasonography with Accuvix XQ3D probe (Medison Co. Korea) in Asan Medical Center between June2004 and October 2005. Thirty-five fetuses with congenital heart anom-alies at various gestational ages were investigated.Results: We obtained abnormal views of 35 fetuses using MSV. TheMSV provided excellent views of great vessel alignment and differenttypes of septal defects.Conclusions: The 3D-XI is an innovative diagnostic tool that incor-porates CT- and MRI-like technologies with ultrasound. 3D-XI pro-vides additional information in fetal echocardiography, particularlyregarding the alignment of great vessels and mapping of septal defects.The data selection and storage functions permit faster and more accu-rate diagnoses.

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Ovarian hyperstimulation syndrome: Clinical review andultrasonographic findingsYoon SK, Cho JH, Oh JY, Choi JC, Nam KJ, Kang M-J, Lee JH,Shin TB, Choi S-S, Lee KN, Han MS, Dong-A University College ofMedicine, Korea

The incidence of ovarian hyperstimulation syndrome (OHSS) follow-ing controlled ovarian hyperstimulation for in vitro fertilization andembryo transfer (IVF-ET) varies from 0.005% to 7% in the moderateform and from 0.008% to 1.9% in the severe form. The purpose of thisstudy was to review OHSS and evaluate US findings, including Dopp-ler study, in patients with moderate or severe OHSS. We performedgray-scale and Doppler US in each case of OHSS. In conclusion,gray-scale and Doppler US are useful in evaluating the size of ovaries,the number of ovarian cysts, internal echogenicity and Doppler param-eters of the ovarian stromal and uterine arteries in moderate or severeOHSS following controlled ovarian hyperstimulation for IVF-ET.

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Sonographic diagnosis of an incomplete uterine ruptureFan Y, The 2nd HuaXi Hospital, SiChuan University, China

A 34-year-old woman who had Cesarean section 5 years ago, presentedwith vaginal bleeding at 26 weeks gestation. At 31 weeks of gestation,hypoechoic zone with a width of 1.6 cm and no blood flow signal wasdepicted on CDFI under the serous membrane of the lower part ofanterior wall. The patient had Cesarean section at the same day.

Abstracts P263