Presentation
Incidental complex renal cyst on ultrasound.
Patient Data
Age: 60 years
Gender: Male
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Axial non-contrast
Cystic left renal lower pole mass with enhancing nodular components and multiple thick enhancing septations. Appearance is consistent with a 'clearly malignant' Bosniak IV renal cyst.
Case Discussion
Nephrectomy was performed and the lesion was confirmed to be a renal cell carcinoma, as was an adjacent smaller lesion which can be seen directly superior to the larger mass.