A and B, Multiple simple cysts (one 7 cm in diameter in the lower pole of the left kidney and three 4 to 5 cm in diameter in the right kidney) detected by contrast-enhanced computed tomography (CT). Additional millimetric cysts might be suspected in both kidneys.

Each cyst exhibits the typical features of an uncomplicated simple cyst on CT: 1) homogeneous low density, unchanged by contrast medium; 2) rounded outline; 3) very thin (most often indetectable) wall; 4) distinct delineation from adjacent parenchyma.

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