Foetal Mri As An Adjunct To Evaluation Of Genitourinary Anomalies: A Single Center Experience

Abstract

Purpose:<br /> To retrospectively correlate foetal MRI's performed over the last 5 years in our center with GUT anomalies and correlate the results with post-delivery results.<br /> Material and Methods:<br /> We retrospectively correlated all foetal MRI's performed over the last 5 years in our center with GUT anomalies and correlated the results with postdelivery results.From a total of 456 foetal MRI's performed 42 studies (GA=27+/-9 wks) were performed either for evaluation of a GU anomaly seen in ultrasound or had an unexpected anomaly detected in MRI. In 33 patients post delivery confirmation in form of phone calls, national registry search results or operation notes/pathology was available.<br /> Results:<br /> Patients included 8 cases of oligohydramnious sent for evaluation of the kidneys (in 7 out of 8 kidneys were located), 5 cases of suspected ARPCKD, one sacrococygeal teratoma, one ambiguous genitalia, one foetal pelvic cyst. In two patients obstructive uropathy was ruled out with MRI despite mild bilateral pelviectases seen in ultrasound and in 3 out of 13 patients with obstructive uropathy MRI provided additional information including one duplicate collecting system with ureterocele later seen in second look ultrasound and two patients with isolated renal cysts or multicystic dysplastic kidney, and one adrenal hemorrhage. Only MRI correctly identified bilateral UPJO and single kidney in two separate patients. DWI images had limited clinical use in evaluating renal function due to large overlap of normal and abnormal ADC values.<br /> Conclusion:<br /> Foetal MRI can provide additional information in genitourinary anomalies. Second look ultrasound is justified in selected cases.