Hydronephrosis
Incidence 1-5/500 new borns
It’s a ultrasound diagnosis –dilatation of the collecting system of the kidney.
The risk of chromosomal anomalies is low as 1-3%
In the first two years of life, spontaneous regression in approximately 40%-50% of cases and need for surgery in 20-30% of cases, according to the grade of hydronephrosis present during the prenatal period.
In bilateral forms associated with oligohydramnios, unfavourable prognosis with the possibility, in very selected cases of in uterotherapy.
Causes of hydronephrosis
Uretero-pelvic junction obstruction
Vesico-ureteric junction obstruction
Megaureter
Cloacal dysgenesis
Complicated duplex kidney
Bladder and urethral obstruction
Abdominal pelvic mass
