33-year-old female with abdominal pain. Unclear history of kidney stones. RIGHT KIDNEY: The right kidney measures 13.9 cm in length with no hydronephrosis, shadowing calculus or discrete lesion evident. Note is made of a prominent column of Bertin, symmetric bilaterally. Color Doppler demonstrates hilar blood flow.LEFT KIDNEY: The left kidney measures 13.4 cm in length with no hydronephrosis or shadowing calculus. There is a 1.4 x 1.2 x 0.8 cm hyperechoic, interpolar cortical lesion without significant associated shadowing.Note is made of a prominent column of Bertin, symmetric bilaterally. Color Doppler demonstrates hilar blood flow.URINARY BLADDER: The urinary bladder is normally distended with anechoic urine.OTHER: No significant abnormalities noted.
1. No hydronephrosis or shadowing nephrolithiasis. 2. Nonspecific 1.4-cm left interpolar hyperechoic lesion could represent an angiomyolipoma or fat. CT could help further characterize this lesion.