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Duplex renal system is a rare congenital anomaly of the urinary tract that can be diagnosed in utero. The purpose of this study was to establish the optimal diagnostic criteria for fetal renal duplication in a population undergoing prenatal sonographic screening. Between January 1989 and June 1997 we found 11 cases of duplex renal system, 10 of which were correctly identified in utero at a median gestational age of 28 weeks (range, 20 to 38 weeks), and one of which was a false-negative diagnosis. Prenatal diagnosis of duplex renal system can be made in utero during the second half of pregnancy in the presence of two or more of the following signs: hydronephrosis limited to one pole in a kidney with two separate, noncommunicating renal pelves; ipsilateral megaureter; and ureterocele.
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P Ceruti, and
A Locatelli, and
E Mariani, and
G Paterlini, and
C Zorloni, and
A Ghidini
May 1998,
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P Vergani, and
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G Paterlini, and
C Zorloni, and
A Ghidini
July 1984,
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G Paterlini, and
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A Ghidini
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