Presentation
Decreased urine output, positive culture of urine, and abdominal distension.
Patient Data
A large subcapsular fluid collection flattens the left kidney contour and displaces it anteriorly. The collection extends to the perirenal space posteriorly slightly compressing the left psoas muscle. The renal excretory phase showed dilated tortuous right ureter, grade 3 right hydronephrosis and a thickened, trabeculated urinary bladder wall.
Dilated posterior urethra with a linear radiolucent band, reflux of the contrast into dilated and tortuous ureters. The bladder showed trabeculation and multiple small diverticula.
Case Discussion
Posterior urethral valves are a cause of lower urinary tract obstruction in male infants. These valves may result in bladder outlet obstruction, with consequent vesicoureteral reflux. In some instances, rupture of calyceal fornices lead to the formation of a urinoma.
Urine was aspirated from the mass and confirmed the perinephric fluid collection.
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