Fetal urinoma as a sign of a dysplastic kidney

Miller, Marc A.; Korzets, Ze’ev; Blumenfeld, Yair J.; Pomeranz, Meir; Aviram, R.; Rathaus, Valeria; Pomeranz, Avishalom

doi:10.1007/s00467-002-0862-x

Cited by 20 publications

(19 citation statements)

References 8 publications

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“…A fetal urinoma is a rare but important finding 3 . Diagnosis is primarily by prenatal ultrasound but further information can sometimes be elicited by magnetic resonance imaging.…”

Section: Discussionmentioning

confidence: 99%

Fetal urinoma: A case report and review of the literature

Vress

Robertson

Paoletti

2015

Australas J Ultrason Med

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“…A fetal urinoma is a rare but important finding 3 . Diagnosis is primarily by prenatal ultrasound but further information can sometimes be elicited by magnetic resonance imaging.…”

Section: Discussionmentioning

confidence: 99%

Fetal urinoma: A case report and review of the literature

Vress

Robertson

Paoletti

2015

Australas J Ultrason Med

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“…[10] The occurrence of fetal urinomas has also been reported following a traumatic amniocentesis. [4] Additionally, Zaccara et al [11] reported three cases of fetal urinomas in female fetuses without an identifiable obstructive uropathy.…”

Section: Discussionmentioning

confidence: 99%

“…[2] According to the current literature, it is more difficult to preserve renal function in cases of fetal urinomas than in their adult counterparts. [3][4][5][6][7][8] In our study, we reviewed the functional prognosis of kidneys with prenatally diagnosed urinomas.…”

Section: Introductionmentioning

confidence: 99%

Fetal urinoma and prenatal hydronephrosis: how is renal function affected?

Oktar

Salabaş

Kalelioğlu

et al. 2013

Turkish Journal of Urology

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Objective: In our study, the functional prognosis of kidneys with prenatal urinomas were investigated. Material and methods:Between 2006 and 2010, fetal urinomas were detected in 19 fetuses using prenatal ultrasonography (US), and the medical records were reviewed retrospectively. Of the 19 cases, the follow-up data were available for 10 fetuses. The gestational age at diagnosis, prognosis of urinomas, clinical course and renal functions were recorded. Postnatal renal functions were assessed with renal scintigraphy.Results: Unilateral urinomas and increased parenchyma echogenicity in the ipsilateral kidney were detected in all of the fetuses. Of the 10 fetuses with follow-up data, the option of termination was offered in 6 cases of anhydramnios, including 3 cases with signs of infravesical obstruction (a possible posterior urethral valve (PUV) and poor prognostic factors and 3 cases with unilateral hydronephrosis and increased echogenicity in the contralateral kidney. Only one family agreed the termination. The other 5 fetuses died during the early postnatal period. The average postnatal follow-up period in the 4 surviving fetuses was 22.5 months (8-38 months). One patient with a PUV underwent ablation surgery during the early postnatal period. In the postnatal period, none of the 4 kidneys that were ipsilateral to the urinoma were functional on scintigraphic evaluation. The urinomas disappeared in 3 cases. Nephrectomy was performed in one case due to recurrent urinary tract infections. Conclusion:In our study, no function was detected in the ipsilateral kidney of surviving patients with urinomas. Upper urinary tract dilatation accompanied by a urinoma is a poor prognostic factor for renal function.

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“…Since prenatal diagnosis was negative, the etiology was deemed to be secondary to trauma during delivery [7] . In the second case, reported by Miller et al in 2001, a perirenal fluid collection was due to traumatic amniocentesis [4] . In the third case, only gross vesico-ureteral reflux was documented [8] .…”

Section: Discussionmentioning

confidence: 99%

“…To our knowledge, urinoma without underlying obstruction in a low-pressure system, as in the female, has been reported only as a complication of amniocentesis [4] . Three cases without any apparent mechanism of formation are described herein.…”

Section: Introductionmentioning

confidence: 99%

Fetal Urinoma in Females without Obstructive Uropathy

Zaccara¹,

Brizzi²,

Mobili³

et al. 2010

Fetal Diagn Ther

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Objective: Prenatal diagnosis of urinomas has long been established with underlying obstructive uropathy generally responsible for urinary extravasation. Because urinoma formation represents a pop-off mechanism in cases of posterior urethral valves, the number of affected males greatly exceeds the number of females. Fetal urinoma has rarely been reported without obstruction and in females it has only been described as a consequence of a complicated amniocentesis. Methods: Three cases of fetal urinoma in female fetuses without any dilatation of the urinary tract are described. Since the fetus remained healthy, they were all conservatively managed. Results: Two urinomas resolved after birth and 1 exhibited significant regression. In the second case, a compressed kidney was visualized with fetal MRI. Renal function was impaired in cases 1 and 3 and absent in case 2 (the kidney was no longer visualized). Conclusions: Fetal urinomas can occur even in the absence of urinary tract obstruction and in a low-pressure system as is found in female fetuses. Fetal MRI may help both visualize the ipsilateral kidney and differentiate the mass from other conditions. In a healthy fetus, fetal urinomas can be conservatively managed, but renal function after birth is often absent or impaired. Whether or not in utero aspiration may be beneficial for the preservation of renal function remains unclear.

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Fetal urinoma as a sign of a dysplastic kidney

Cited by 20 publications

References 8 publications

Fetal urinoma: A case report and review of the literature

Fetal urinoma: A case report and review of the literature

Fetal urinoma and prenatal hydronephrosis: how is renal function affected?

Fetal Urinoma in Females without Obstructive Uropathy

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