Stones in Caliceal Diverticula: Removal by Percutaneous Nephrolithotomy
Pyelocaliceal diverticula are rare congenital malformations of the renal collecting system, with a small cavity being connected by a narrow channel to a calix or the renal pelvis, and both the diverticulum and the collecting channel are lined by transitional epithelium . The incidence of this malformation as found on routine IVP studies is reportedly between 0.21%  and 0.45% . No treatment is required unless symptoms from the most common complications of stone formation and infection occur .
KeywordsCatheter Gravel Cali
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