PMC5399732_01
A noncontrast CT KUB showing bilateral renal and a right pelviureteral calculus. KUB, kidney, ureter, and bladder radiograph.
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Over the next 2 years, he presented to the Urology Department several times with episodes of urolithiasis, which were difficult to manage as they were often bilateral, large, and radiolucent on plain X-rays and were matrix-like in character (Fig. 1).