midabdominal mass - abrahem

[ArchivalUser]

A male neonate has a palpable midabdominal mass. Abdominal ultrasonography shows no kidneys in the normal anatomic position and a single U-shaped renal mass with two collecting systems near the aortic bifurcation. Which of the following embryologic events best explains this finding?

A) Division of the metanephric diverticulum

B) Failed development of the ureteric bud

C) Failed differentiation of the urogenital sinus

D) Fusion of the metanephric masses

E) Normal development of two ureteric buds

[ArchivalUser]

B)

[ArchivalUser]

i chose D

[ArchivalUser]

failure of one or both kidneys to develop because of early degeneration of the ureteric bud.

Kaplan Anatomy 2005

[ArchivalUser]

thx irina

[ArchivalUser]

It is more likely Horseshoe kidney.
So probably D.