Soft tissue rim sign - ureteric stone

Case contributed by Dr Andrew Dixon

Presentation

Right abdominal pain.

Patient Data

Age: 30
Gender: Male

Renal Colic CT

Modality: CT

Horseshoe kidney and right side back pressure changes.

Soft tissue rim sign

Modality: Annotated image

Bilateral calcific densities near the vesicoureteric junctions. Right calcific density (red arrow) is completely surrounded by a soft tissue density rim consistent with a ureteric stone surrounded by an oedematous ureter wall (soft tissue rim sign). The left calcific density (green arrow) cannot be a ureteric stone as it is completely surrounded by fat density and it is therefore a phlebolith.

Case Discussion

Patient with horseshoe kidney. Right sided hydronephrosis and hydroureter with perinephric and periureteric fat stranding. Bilateral calcific densities near the vesicoureteric junctions. One right calcific density is completely surrounded by a soft tissue density rim consistent with a ureteric stone surrounded by an oedematous ureter wall (soft tissue rim sign). The other calcific densities are phleboliths that are surrounded by fat instead of soft tissue.  

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Case Information

rID: 19046
Case created: 3rd Aug 2012
Last edited: 10th Nov 2015
System: Urogenital
Inclusion in quiz mode: Included

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