Bilateral Renal Colic as an Initial Presentation of Erdheim-Chester Disease

Figure 1

Injected computed tomography of the abdomen after bilateral ureteral stent insertion: arrows showing the infiltration of the right (a) and left (b) kidneys by a homogeneous tissue enclosing the pelvis, signs of retroperitoneal fibrosis. No characteristic “hairy kidney” appearance and no signs of aortic involvement.

(a)

(b)