Home > E. Pathology by systems > Urinary system > Kidneys > fetal hydronephrosis
fetal hydronephrosis
Thursday 19 February 2004
Definition: Dilatation of the renal pelvis and calices due to a urinary obstruction.
Fetal hydronephrosis is the most common cause of an abdominal mass of genitourinary tract origin in neonates.
Types
unilateral fetal hydronephrosis
bilateral fetal hydronephrosis
Synopsis
pelvicalyceal dilatation
renal parenchymal atrophy
renal parenchymal fibrosis
blunting of medullary pyramids
foci of residual renal parenchyma
Etiology
unilateral congenital hydronephrosis
- pelviureteric junction stenosis (most frequent cause)
bilateral congenital hydronephrosis (20%)
Associations
Renal dysplasia
