Posterior urethral valve - antenatal ultrasound
2nd gravida for anomaly scan. 20 weeks of amenorrhoea.
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There is a singleton intrauterine pregnancy with maturity concordant with gestational age. There is mild oligohydramnios (without history of leaking).
Fetal urinary bladder is over-distended (35 cc volume). It shows mural trabeculations. There is bilateral hydronephrosis. There is no peri-nephric collection/urinoma. Neither ureter could be traced.
There is another finding of peri-cardial effusion.
Rest of fetal anatomical survey is normal (not uploaded).
Asymptomatic 2nd gravida patient presents for 20-week anomaly scan. There is mild oligohydramnios. There is the presence of a keyhole sign favouring posterior urethral valve.