Infected renal cyst

Case contributed by Dr Maulik S Patel


Right flank pain and dysuria for 2 - 3 days.

Patient Data

Age: about 45 yrs
Gender: Female

These are 3rd wk USG images. Initial USG images are not available.

Urothelial thickeing is seen involving pelvis and calyces.

A cyst with internal echoes and thick wall in upper pole of right kidney.

Fluid rim in hepato-renal region.

Cyst measures 38 x 35 mm.


Follow up 4 -5 wks later. Patient was under antibiotic treatment. No intervention.

There is no cyst in right kidney. Parenchymal is normal. Right perinephric fluid rim is still present.

Case Discussion

First ultrasound (not shown): right renal pelvi-calyceal urothelial thickening without back pressure or calculus. Right renal cortical cyst ( 28 x 25 mm ) was present. 
Urine examination - revealed infection. Patient treated for pyelonephritis and recovered within a week. 
At the beginning of the 3rd week patient again came with right flank pain ( pain more than 1st episode) and fever. Ultrasound  at this presentation showed that renal cyst has increased in size. There were internal echoes and wall thickening. Rim of fluid was seen in hepato-renal region. Findings favor infected renal cyst. Last follow up after few weeks of antibiotics; there was absence of renal cyst. However, rim of fluid was present in perinephric space. 

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Case information

rID: 37729
Published: 8th Aug 2015
Last edited: 24th Nov 2015
System: Urogenital
Inclusion in quiz mode: Included

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