Fig. 4From: Differentiation of renal angiomyolipoma without visible fat from small clear cell renal cell carcinoma by using specific region of interest on contrast-enhanced CT: a new combination of quantitative toolsSchematic diagram of the morphological features of ccRCC and AML.wovf. a, a 70-year-old male with histopathologically proven ccRCC. Pseudocapsule sign is shown as a low attenuation ring at the edge of tumor (red arrow). b, a 57-year-old male with histopathologically proven ccRCC. Cystic degeneration is observed in the central area of tumor (yellow arrow). c, a 49-year-old female with histopathologically proven AML.wovf. Angular interface with an angle less than 90° is observed between the tumor and the surrounding tissue (blue arrow)Back to article page