Staghorn calculus

Case contributed by Michael P Hartung
Diagnosis certain


Abdominal pain.

Patient Data

Age: 60 years
Gender: Female

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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