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. Author manuscript; available in PMC: 2019 Jul 1.

Published in final edited form as: Abdom Radiol (NY). 2018 Jul;43(7):1756–1763. doi: 10.1007/s00261-017-1376-0

Figure 3. — a). Homogeneous masses with attenuation greater than 20 HU and less than 70HU are indeterminate and may represent renal cancer. Axial unenhanced CT image obtained in a 72-year-old male shows a 2.9 cm homogeneous mass measuring 49 HU deforming the outer contour of the right kidney (arrow). Although this finding was identified, it was diagnosed as a cyst in the radiology report; it was diagnosed 9 months later as renal cell carcinoma (RCC). b). Heterogeneous masses which deform the renal contour may represent renal cancer. Axial unenhanced CT image obtained in a 57-year-old male shows a 7.1 cm heterogeneous mass (arrows) deforming the outer contour of the left kidney (arrowheads). Although this finding was identified, no diagnosis was offered and follow-up was not recommended. The mass was diagnosed 1 month later as RCC.

Figure 3. — a). Homogeneous masses with attenuation greater than 20 HU and less than 70HU are indeterminate and may represent renal cancer. Axial unenhanced CT image obtained in a 72-year-old male shows a 2.9 cm homogeneous mass measuring 49 HU deforming the outer contour of the right kidney (arrow). Although this finding was identified, it was diagnosed as a cyst in the radiology report; it was diagnosed 9 months later as renal cell carcinoma (RCC). b). Heterogeneous masses which deform the renal contour may represent renal cancer. Axial unenhanced CT image obtained in a 57-year-old male shows a 7.1 cm heterogeneous mass (arrows) deforming the outer contour of the left kidney (arrowheads). Although this finding was identified, no diagnosis was offered and follow-up was not recommended. The mass was diagnosed 1 month later as RCC.