Presentation
Bilateral flank pain and nausea.
Patient Data
Age: 35 years
Gender: Male
From the case:
Bilateral renal and ureteral calculi
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Axial non-contrast

Multiple calculi up to 4-6 mm in kidneys, a calculus with coronal height up to 7 mm in left side ureter middle segment, and a few calculi up to 5 mm in right side ureter distal segment extended within right side UVJ with upstream hydroureteronephrosis more severe in the left side are seen.
Case Discussion
The case illustrates non-contrast MDCT features of bilateral concomitant renal and ureteral calculi, which is relatively uncommon. The major cause of ureteral obstruction is ureteral calculi. Multiple and recurrent renal calculi can cause chronic renal disease in the long term.