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(A) Prone contrast-enhanced CT on lung windows shows the right upper pole clear cell renal cell carcinoma (black arrow) in a 48-year-old male to be obscured by the overlying lung (white arrow). (B) Contrast-enhanced CT in the prone oblique (right side-down). The mass (black arrow) is no longer obscured by the lung and was treated without transgressing the lung parenchyma.
