Renal cyst - Bosniak class IV

Case contributed by Mohammad Taghi Niknejad
Diagnosis almost certain

Presentation

Work up for hematuria.

Patient Data

Age: 60 years
Gender: Male

A 22 mm cyst was seen in upper pole of right kidney. After IV contrast media, abnormal enhancement was noted within as peripheral nodule and internal septa compatible with Bosniak class IV.

Several tiny stones less than 3 mm in diameters were seen in both renal calyces. 

The prostate gland is enlarged.

Case Discussion

The patient underwent mass resection and histopathology evaluation confirms renal cell carcinoma (clear cell subtype).

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