Effect of lower infundibulopelvic angle, lower infundibulum diameter and inferior calyceal length on stone formation

The effect of anatomical factors such as lower infundibulopelvic angle (LIP A), lower infundibulum diameter (LID) and inferior calyceal length (ICL) on renal stone formation was investigated. These parameters were measured fro m noncalculous kidneys of 40 healthy kidney donors. The same parameters fro m 119 patients with single, unilateral, nonobstructive lower calyceal stone were also measured, LID and ICL were significantly higher in calculous kid neys when compared to the control group. On the other hand, the difference between the LIPA of the two groups was not significant. It is concluded tha t LID and ICL could be good indices in determining lower calyceal stone for mation. Copyright (C) 1999 S. Karger AG, Basel.