Fig 2. A–F, Magnetic resonance imaging (MRI) of bilateral
renal masses in a patient with Rosai–Dorfman disease. (A) Masses
(thin arrows ) have hypo to isointense signal on transverse T1
weighted image and (B) appear as mild heterogeneous hyperintense masses
on transverse T2-weighted image (C) Masses have moderate enhancement on
transverse gadoxetic acid-enhanced nephrogenic phase image and (D)
sustain enhancement in the delayed phase. (E) Mild hyperintense masses
on diffusion-weighted imaging obtained with a b-value of 800
s/mm2 and (F) hypointense masses on apparent diffusion
coefficient map.