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MRI of Fetal Genitourinary Anomalies

¹ Department of Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-8896.
² Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX 75390-8896.
³ Perinatal Associates of Texas, Ste. 205, 8315 Walnut Hill Ln., Dallas, TX 75230-5104.

OBJECTIVE. The objective of our study was to show examples of fetal MRI evaluations of congenital genitourinary anomalies and to review the embryology in relation to the MRI findings.

CONCLUSION. MRI was performed on 35 pregnant women with sonographic findings that suggested that their fetuses had genitourinary anomalies. Oligohydramnios or anhydramnios was identified in 22 of 35 women and did not hinder visualization of anomalies. MRI allowed the amniotic fluid and the presence, location, and morphology of kidneys and bladder to be assessed in all fetuses at any stage of gestation and depicted sufficient anatomic detail for us to evaluate the perineum in 27 of 35 pregnancies. Therefore, we found MRI to be an excellent technique for revealing the anatomy of genitourinary anomalies in the fetus.

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