Prenatal ultrasonographic renal findings are described in three cases of trisomy 13. The association of renal anomalies, including hyperlobulation, dysplasia and presence of cortical cysts, with trisomy 13 has been reported previously. This series, however, points out the importance of considering trisomy 13 as a possible diagnosis and recommends prenatal diagnosis when renal abnormalities are found on ultrasound examination.
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