Fig. 1
From: Primary Ewing’s sarcoma of the kidney: a rare masquerader of renal cell carcinoma on imaging
A Sagittal Gray Scale Sonography image of the left kidney shows an ill-defined hypoechoic mass (asterisk) in the upper pole causing compression and displacement of the renal sinus fat. B Colour Doppler image, using low frequency curvilinear transducer does not show any obvious vascularity of the mass lesion (asterisk) in the upper pole of the kidney