The following is an excerpt....
BASICS
Description
- A staghorn calculus is a branching calculi that fills the majority of the intrarenal collecting system.
- Complete staghorns involve the renal pelvis and branch into minor/major infundibulum and calyces.
- Partial staghorn: Incomplete filling of the intrarenal collecting system
- Typically consist of pure forms or combinations of:
- Struvite (magnesium ammonium phosphate or triple phosphate), usually due to infection
- Calcium carbonate apatite
- Cystine stones: Calcium oxylate and calcium phosphate (very uncommon)
Epidemiology
More common in women
Risk Factors
- Chronic indwelling catheters
- Metabolic disorders such as hyperoxaluria, cystinuria, or hypercalciuria
- Propagated by states of stasis and/or obstruction
- Recurrent UTIs
- Reflux of urine, neurogenic bladder, preexisting stone disease, stricture disease
- Urinary diversions
Pathophysiology
- Any type of calculus can form a ...
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