Right renal pelvis visualization in females: incidental detection in routine bone scanning.

A 22% incidence of renal pelvis or calyceal "hot spot" anomalies was found incidental to routine bone scanning. The majority of these anomalies were due to bilateral or right renal pelvis visualization, and statistical analysis determined there to be a significant female incidence, and persistence in repeat studies. This suggests an anatomical or functional basis for this finding.