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Fetal monolateral urinoma and neonatal renal function outcome in posterior urethral valves obstruction: the pop-off mechanism.
Pediatr Med Chir. 2002 Sep-Oct; 24(5):394-6.PM

Abstract

The "fetal urinoma" is a clinical and diagnostic entity due to urinary extravasation, early diagnosed in fetal and/or neonatal period. Both urinoma and urinary ascites, whose pathogenesis is not clear, are recognized associations of uterero-pelvic junction obstruction (UPJO) and neonatal posterior urethral valves (PUV) related with a protected fetal and neonatal renal function. Clinical and experimental studies have demonstrated that fetal urinary tract obstruction results in severe renal parenchymal injury. The so called "pop-off" valve mechanism has been advocated to justify the upper tract function preservation. Protective "pop-off" mechanisms, such as a unilateral reflux and dysplasia, urinary extravasation and congenital bladder diverticula are present in about 30% of patients with PUV. Their presence correlates with better overall long-term renal function. This mechanism has been justified as a sort of self derivation, to explain the renal function preservation in fetal and neonatal period. In the last two years we observed three cases of fetal monolateral urinoma, prenatally detected in fetuses with diagnosis of PUV. All three cases did well for that concerning renal function despite some current opinions suggesting the necessity of a bilateral urinary extravasation in order to preserve upper urinary tract function.

Authors+Show Affiliations

Department of Pediatric Surgery, Ospedale Pediatrico Bambino Gesù, Rome, Italy. silveri@opbg.netNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

12494545

Citation

Silveri, M, et al. "Fetal Monolateral Urinoma and Neonatal Renal Function Outcome in Posterior Urethral Valves Obstruction: the Pop-off Mechanism." La Pediatria Medica E Chirurgica : Medical and Surgical Pediatrics, vol. 24, no. 5, 2002, pp. 394-6.
Silveri M, Adorisio O, Pane A, et al. Fetal monolateral urinoma and neonatal renal function outcome in posterior urethral valves obstruction: the pop-off mechanism. Pediatr Med Chir. 2002;24(5):394-6.
Silveri, M., Adorisio, O., Pane, A., Zaccara, A., Bilancioni, E., Giorlandino, C., & De Gennaro, M. (2002). Fetal monolateral urinoma and neonatal renal function outcome in posterior urethral valves obstruction: the pop-off mechanism. La Pediatria Medica E Chirurgica : Medical and Surgical Pediatrics, 24(5), 394-6.
Silveri M, et al. Fetal Monolateral Urinoma and Neonatal Renal Function Outcome in Posterior Urethral Valves Obstruction: the Pop-off Mechanism. Pediatr Med Chir. 2002 Sep-Oct;24(5):394-6. PubMed PMID: 12494545.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fetal monolateral urinoma and neonatal renal function outcome in posterior urethral valves obstruction: the pop-off mechanism. AU - Silveri,M, AU - Adorisio,O, AU - Pane,A, AU - Zaccara,A, AU - Bilancioni,E, AU - Giorlandino,C, AU - De Gennaro,M, PY - 2002/12/24/pubmed PY - 2003/2/14/medline PY - 2002/12/24/entrez SP - 394 EP - 6 JF - La Pediatria medica e chirurgica : Medical and surgical pediatrics JO - Pediatr Med Chir VL - 24 IS - 5 N2 - The "fetal urinoma" is a clinical and diagnostic entity due to urinary extravasation, early diagnosed in fetal and/or neonatal period. Both urinoma and urinary ascites, whose pathogenesis is not clear, are recognized associations of uterero-pelvic junction obstruction (UPJO) and neonatal posterior urethral valves (PUV) related with a protected fetal and neonatal renal function. Clinical and experimental studies have demonstrated that fetal urinary tract obstruction results in severe renal parenchymal injury. The so called "pop-off" valve mechanism has been advocated to justify the upper tract function preservation. Protective "pop-off" mechanisms, such as a unilateral reflux and dysplasia, urinary extravasation and congenital bladder diverticula are present in about 30% of patients with PUV. Their presence correlates with better overall long-term renal function. This mechanism has been justified as a sort of self derivation, to explain the renal function preservation in fetal and neonatal period. In the last two years we observed three cases of fetal monolateral urinoma, prenatally detected in fetuses with diagnosis of PUV. All three cases did well for that concerning renal function despite some current opinions suggesting the necessity of a bilateral urinary extravasation in order to preserve upper urinary tract function. SN - 0391-5387 UR - https://www.unboundmedicine.com/medline/citation/12494545/Fetal_monolateral_urinoma_and_neonatal_renal_function_outcome_in_posterior_urethral_valves_obstruction:_the_pop_off_mechanism_ L2 - http://www.diseaseinfosearch.org/result/5898 DB - PRIME DP - Unbound Medicine ER -