Presentation
Early third trimester scan. No complaints.
Patient Data
Age: about 24 yrs.
Gender: Female
From the case:
Posterior urethral valve - antenatal ultrasound
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Nearly absent liquor. The over-distended urinary bladder with "key-hole" appearance. Bilateral hydronephrosis and hydroureter. Enlarge right kidney (34 mm length) due to moderate hydronephrosis. Enlarged left kidney (43 mm length)due to severe hydronephrosis. Rim of left perinephric fluid.
Case Discussion
An early third-trimester scan reveals oligohydramnios due to a posterior urethral valve. The urinary bladder shows a keyhole sign.
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