Diagnostic Ultrasound - Abdomen and Pelvis

Ureteropelvic Junction Obstruction
(Left) Longitudinal image of
the left kidney demonstrates
multiple cystic structures with
the largest centrally ſt,
suggestive of UPJ obstruction
rather than multicystic
dysplastic kidney. Note the
severe cortical thinning.
(Right) Longitudinal image of
the left kidney demonstrates
marked dilatation of the renal
pelvis ſt with only mild
dilatation of the renal calyces
st.
Diagnoses: Urinary Tract
(Left) Post-contrast coronal CT
abdomen demonstrates right
UPJ obstruction in a boy who
presented after minor trauma.
Note the fluid in the right
retroperitoneum ſt,
suggestive of rupture. (Right)
Coronal CT angiogram
demonstrates the presence of
a crossing arterial vessel ſt in
the region of the right UPJ,
with a dilated renal pelvis st.
(Left) Coronal reformatted 3D
image from a CT urogram
demonstrates a malrotated
right pelvic kidney with UPJ
obstruction ſt, with a normal
caliber ureter. There is a
double "J" ureteral stent st
terminating in the bladder.
(Right) Longitudinal
ultrasound shows a right
kidney with UPJ obstruction
obtained after pyeloplasty.
Note the residual dilatation of
the renal pelvis ſt and calyces
st, which may persist for
years.
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