Polycystic kidney with infected cyst

Case contributed by Dr Chris O'Donnell


Left pyelonephritis not settling following 6 days of antibiotics. No significant past history. Normal renal function.

Patient Data

Age: 20
Gender: Female

Multiple cystic lesions in both kidneys including a large lesion in the left mid pole containing internal echoes

CT is typical of polycystic disease i.e. large kidneys with multiple cysts. Note mid pole left kidney loculated cyst containing slightly increased density fluid and "fuzzy" margins.  

The abnormal cyst went on to be aspirated under ultrasound control which confirmed the presence of pus and thus consistent with an infected cyst.

Case Discussion

Although polycystic kidneys can be daunting to evaluate, one must remember that in addition to cysts they can also harbour other pathology (e.g. tumours, or as in this case infection). 

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Case information

rID: 19368
Published: 2nd Sep 2012
Last edited: 4th Feb 2016
System: Urogenital
Inclusion in quiz mode: Included

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