label: Fetal lower urinary tract obstruction
label_lc: fetal lower urinary tract obstruction
description: "An obstruction in the ureter leading to bladder outlet obstruction. Special criteria are used for lower urinary tract obstruction (LUTO) in the fetus. Prenatal LUTO has classically been suspected on the basis of three ultrasonographic findings: megacystis, dilated posterior urethra (known as the keyhole sign) and hydronephrosis."