Bosniak renal cyst - type II
Complex cyst on ultrasound.
CT Abdomen and pelvis (selected images)
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Images: no contrast, arterial phase, portal venous phase and equilibrium. Exophytic cyst in the upper third of the right kidney, with 2.3 cm and attenuation greater than 20UH without enhancement.
The Bosniak classification system for CT evaluation of renal cysts is helpful in determining both malignant risk and required followup / treatment.
It is not necessary follow-up CT scan.