PRENATAL SONOGRAPHIC FINDINGS ASSOCIATED WITH A FETAL HORSESHOE KIDNEY

Fusion of the upper or lower poles of the kidneys produces a horseshoe-shaped structure continuous across the midline, anterior to the great vessels. This anomaly is relatively common and is found in about 1 in 500 to 1 in 1,000 autopsies.1 Although the majority of such kidneys are fused at the lower pole, 10% are fused at the upper pole.1 This developmental abnormality occurs between approximately 7 and 9 weeks of gestation.2 We present a case of the prenatal sonographic findings associated with a fetal horseshoe kidney.