False diagnosis of renal agenesis on fetal MRI.

Ultrasound Obstet Gynecol

Department of Pediatrics, St. Michael's Hospital, University of Toronto, Ontario, Canada.

Published: February 2005

AI Article Synopsis

  • A twin pregnancy was investigated where both fetuses showed indicators of anhydramnios and absent kidneys through prenatal ultrasound.
  • Efforts to clarify the kidney status using fetal MRI confirmed renal agenesis in both twins, but postnatal follow-up revealed one twin had a small kidney not detected before.
  • The second twin had complete kidney absence and unfortunately passed away due to lung complications, emphasizing the need for caution when relying solely on fetal MRI in such cases.

Article Abstract

We report a twin pregnancy in which prenatal ultrasound revealed anhydramnios and bilateral absence of the kidneys in both fetuses. To overcome the difficulties faced in obtaining accurate information on fetal ultrasound in cases with oligohydramnios, an attempt was made to use fetal magnetic resonance imaging (MRI) to confirm the renal status. However, while the fetal MRI showed renal agenesis in both twins, postnatal follow-up revealed that one twin, which survived, had a small unilateral kidney not seen antenatally on fetal ultrasound or MRI. The second twin had bilateral renal agenesis and died of pulmonary hypoplasia. Care should be taken when using fetal MRI to replace fetal ultrasound in cases with poor visibility.

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http://dx.doi.org/10.1002/uog.1739DOI Listing

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