KMID : 0361720040150030255
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Korean Journal of perinatology 2004 Volume.15 No. 3 p.255 ~ p.261
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Original Reports : Postnatal outcome of Prenatally detected Fetal Hydronephrosis
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Kim Shin-Ah
Lee Jeong-Jae Choi Gyu-Yeon Park Seon-Yeong Cha Sang-Heon Jeong Seong-Yun Lee Im-Soon Lee Kwon-Hae
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Abstract
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Objective: To help prenatal counselling in fetal hydronephrosis by demonstrating the postnatal investigation, treatment and outcome of infants with hydronephrosis prenatally diagnosed.
Methods: Between January 2000 and December 2001, we studied 20 infants who presented with fetal hydronephrosis confirmed by postnatal ultrasonography. In the postnatal follow-up period, the infants were followed with sequential ultrasonography and urinalysis. 99mTc-DTPA scan, intravenous pyelography and voiding cystourethrography were performed in selected cases. An anteroposterior renal pelvic diameter >7 mm after 30 weeks of pregnancy was defined as fetal hydronephrosis. Follow-up ranged from 6 to 18 months (mean, 12).
Results: Unilateral hydronephrosis was diagnosed in 13 infants and bilateral in 7. A male predilection was found (4:1) and the left kidney was more commonly involved. If there was no resolution, ultrasonographic follow-up was done until 18 months. As a results, hydronephrosis resolved in 11, who were all in the unilateral hydronephrosis group. The range of the fetal renal pelvis on prenatal ultrasonography was 7~13 mm in the resolution group. Pyeloplasty was performed in two unilateral hydronephrosis infants.
Conclusion: When the fetal renal pelvis was below 14 mm at least on prenatal ultrasonography, it didn¡¯t progress. Fetal hydronephrosis below 14 mm may be safely observed, and surgical correction was performed only a few infants. So, we suppose that this outcome must be considered enough in prenatal counsellings and that the work-up for more many people is needed, because of the small number of the patients whose renal pelvic diameter is above 14 mm in this study.
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KEYWORD
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Hydronephrosis, Postnatal outcome, Prenatal counselling
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