PMC3905711_01
Axial CT image demonstrates tiny serpinginous tubular structures connecting with each other in the retroperitoneum.
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They began intrarenally and extended caudally surrounding the ureter in the retroperitoneum (Figures 1 and 2A, 2B).
(A) Coronal reformatted images revealed periureteral lace-like dansities. (B) Coronal MIP image shows same findings.
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They began intrarenally and extended caudally surrounding the ureter in the retroperitoneum (Figures 1 and 2A, 2B).
Antegrad pyelography image obtained with the patient in the prone position, shows no leakage from ureter to retroperitoneum.
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However, no leakage from the ureter to the retroperitoneum was observed, proving that the changes demonstrated by a CT were due to pyelolymphatic reflux caused by increased pressure in the collecting tubules filling the lymphatics with opaque urine (Figure 3).