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Measurement of compensatory hyperplasia of the contralateral kidney: usefulness for differential diagnosis of fetal unilateral empty renal fossa

Cited 9 time in Web of Science Cited 15 time in Scopus
Authors
Cho, J. Y.; Moon, M. H.; Lee, Y. H.; Kim, K. W.; Kim, S. H.
Issue Date
2009-11
Publisher
JOHN WILEY & SONS LTD
Citation
ULTRASOUND IN OBSTETRICS & GYNECOLOGY; Vol.34 5; 515-520
Keywords
congenital anomalyfetal USrenal ectopyrenal agenesis
Abstract
Objective To assess the usefulness of sonographic evaluation of compensatory hyperplasia of the contralateral kidney for the differential diagnosis of fetal unilateral empty renal fossa (ERF). Methods We retrospectively measured the ratio of the anteroposterior (AP) and transverse (TR) diameters of the contralateral kidney in 24 fetuses with unilateral ERF including 12 cases of unilateral renal agenesis, six cases of a unilateral pelvic kidney and six cases of a unilateral ectopic multicystic dysplastic kidney (MCDK). For the normal reference value, we calculated the AP: TR diameter ratios of both kidneys in 20 normal fetuses in the second and third trimesters. We calculated the accuracy of the AP: TR ratio to detect contralateral compensatory hyperplasia. Results The median (range) AP: TR diameter ratios of the normal kidneys were 0.84 (0.72-0.89) in the second trimester and 0.81 (0.65-0.89) in the third trimester. All cases of unilateral renal agenesis and ectopic MCDK showed the presence of compensatory, hyperplasia, while no case of renal ectopy was seen with compensatory hyperplasia. The median (range) ratios for unilateral renal agenesis and ectopic MCDK were 1.0 (0.95-1.02) and 1.1 (1-1.25) in the second and third trimesters, respectively. The median ratios for a unilateral pelvic kidney were 0.8 (0.74-0.85) and 0.77 (0.74-0.84) in the second and third trimesters, respectively. Using 0.9 as the discriminating value, the sensitivity, specificity, and accuracy of the AP: TR diameter ratio for the prenatal diagnosis of compensatory renal hyperplasia was 100%. Conclusion Sonographic evaluation of compensatory hyperplasia of the contralateral kidney may be useful for the differential diagnosis of a fetal unilateral ERF. Prospective studies are warranted. Copyright (C) 2009 ISUOG. Published by Jobn Wiley & Sons, Ltd.
ISSN
0960-7692
Language
English
URI
https://hdl.handle.net/10371/78124
DOI
https://doi.org/10.1002/uog.7336
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College of Medicine/School of Medicine (의과대학/대학원)Radiology (영상의학전공)Journal Papers (저널논문_영상의학전공)
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