Bosniak renal cyst - type I

Case contributed by David Cuete


Renal mass on ultrasound.

Patient Data

Age: 55 years
Gender: Female

Hypoattenuating cysts characterized as homogeneous thin-walled and nonenhancing fluid-attenuation lesions.


Illustration of the commonest type of Bosniak cyst - a type I ( simple cyst ).

Case Discussion

Hypoattenuating cysts characterized as homogeneous thin-walled, nonenhancing fluid-attenuation lesions are classified on Bosniak category I,  and are rarely problematic when encountered incidentally at contrast–enhanced CT. 

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