Renal Mass Table of Contents Non-contrast CT massContrast-CT massMass with macroscopic fatCystic renal mass Bosniak classificationSolid mass too small to characterize Source: Herts BR, Silverman SG, Hindman NM, et al. Management of the Incidental Renal Mass on CT: A White Paper of the ACR Incidental Findings Committee. J Am Coll Radiol. 2018;15(2):264-273. doi:10.1016/j.jacr.2017.04.028 Mass on Non-contrast CT Mass on Contrast CT Renal Mass Containing Macroscopic Fat Cystic Renal Mass on Renal Mass Protocol Classic Bosniak Classification Updated Bosniak Classification (2019); Source: Silverman SG, Pedrosa I, Ellis JH, et al. Bosniak Classification of Cystic Renal Masses, Version 2019: An Update Proposal and Needs Assessment. Radiology. 2019;292(2):475-488. doi:10.1148/radiol.2019182646 Solid Mass Too Small to Characterize on CT Renal Mass Protocol