Presentation
Abdominal pain.
Patient Data
Age: 60 years
Gender: Female
From the case:
Staghorn calculus
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Large right renal stone cast following the contours of the calyces and pelvis. On bone windows, the laminations are apparent. Mild stranding about the right pelvis, consistent with inflammation.
Case Discussion
Staghorn calculi are usually branching and so called because they resemble the antlers of a stag. They are usually composed of struvite and are associated with recurrent urinary tract infections, resulting in alkaline urine. If untreated, this could progress to xanthogranulomatous pyelonephritis.
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