Persistent fetal renal lobulation
Incidental finding on CT abdomen for abdominal pain. No urinary symptoms.
Loading Stack -
0 images remaining
Bilateral, lobulated renal cortices corresponding to a each renal pyramid. No hydronephrosis.
In the fetus, renal lobes (consisting of a pyramid of collecting tubles and overlying cortex) are separate, eventually fusing to form the typical reniform shape with a smooth surface. These lobes can persist to produce a lobulated cortical surface, each representing a pyramid and overlying cortex with a valley in between as compared to renal scarring due to vesico-ureteric reflux, where there are cortical defects overlying the pyramids especailly at the upper and lower poles.