72-year-old man with right interpolar 3.2-cm renal mass (IMAGE)
Caption
Axial CT images in the (A) unenhanced, (B) corticomedullary, and (C) nephrographic phases at the same level depict the mass (arrow, A and C), which shows avid heterogeneous enhancement. Circular ROIs were placed in the most enhancing component of the mass and in ipsilateral renal cortex (circles, B), to determine the mass-to-cortex corticomedullary attenuation ratio. Heterogeneity scores were assigned subjectively using a 5-point Likert type-scale. These two features were used to inform development of the CT score. In this patient, the mass showed avid enhancement (mass-to-cortex corticomedullary enhancement ratio >0.75) and was considered completely heterogeneous (heterogeneous score, 5) by both radiologists, resulting in CT score 5. Nephrectomy revealed clear-cell renal cell carcinoma.
Credit
American Roentgen Ray Society (ARRS), American Journal of Roentgenology (AJR)
Usage Restrictions
Content may only be used with appropriate caption or credit.
License
Original content