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Diffusion weighted coronal image and fused DWI and Axial T2w images show a large mass with restricted diffusion in the upper pole of the right kidney consistent with renal cell carcinoma invading the renal vein and the inferior vena cava.
Diffusion imaging offers an adjunct to traditional post contrast MRI. High cellular density and abundant macromolecules in the cytosol cause the speed of diffusion of H2O in malignant tissues to slow. This restriction of diffusion can be measured with MRI.
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