Presentation
Left sided colicky abdominal / loin pain.
Patient Data
Age: 40 years
Gender: Male
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KUB (frontal and oblique) demonstrate a density just above the transverse process of L3, suspicious for a calculus.
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Small calculus (blue arrow) is seen on bone projections, in line with the likely course of the ureters.
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Non contrast CT KUB confirms the presence of a small left ureteric calculus at the level of L3. The collecting system proximal to it is normal in appearance. The stone measure 3 x 4 x 7mm and has a density of 480HU.
Case Discussion
This patient went on to pass the stone spontaneously, without additional imaging.