PMC4322375_01
38-year-old male presented with bilateral flank pain and was later diagnosed with bilateral renal lymphangiectasia. (a and b) Axial non-contrast CT images at the level of the kidneys show perirenal (long arrows) and peripelvic (short arrows) cysts with fluid density. (c and d) Sonography of the kidneys along the longitudinal plane show perirenal (long arrows) and peripelvic (short arrows) cysts with septations and clear fluid contents together with increased parenchymal echogenicity.
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F1
CT scan showed perirenal and peripelvic encysted fluid densities without hydronephrosis, nephrolithiasis, or urolithiasis [Figure 1a and b]. Hyperechoic renal parenchyma was noted bilaterally [Figure 1c and d].
38-year-old male presented with bilateral flank pain and was later diagnosed with bilateral renal lymphangiectasia. (a) MRI axial T1-weighted image of the kidneys and (b) Axial post-contrast T1-weighted delayed phase image show the cysts have dark T1 signal (white asterisks) with lack of contrast pooling inside the cysts in the delayed phase, confirming absence of communication with the renal collecting system. (c) Axial T2 fat-suppressed weighted image and (d) coronal reformatted maximum intensity projection T2 fat-suppressed image demonstrate cysts with fluid signal intensity (black asterisks) and dilated retroperitoneal lymphatic channels (arrowheads), together with dilatation and tortuosity of the cisterna chyli (long arrow) and thoracic duct (short arrow).
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F2
T1-weighted images (T1WI) and high signal in T2-weighted images (T2WI) without contrast pooling in the delayed post-contrast images, indicating absence of communication with the renal collecting system. The renal cortex showed high T2 signal [Figure 2a and b].