Difficult Renal Stones
in Patients with Urinary Diversion
stones may occur after ureteroenteral diversion. These stones are
most commonly seen between 5 and 10 years after urinary diversion
surgery. The etiology of these stones may be due to infection and
urea-splitting organisms, foreign body in the reservoir, mucus produced
by the bowel and metabolic disturbances (hyperchloremic acidosis).
The stones that form may be composed of a mixture of magnesium ammonium
phosphate, carbonate apatite, calcium phosphate and calcium oxalate.