[Radiographic evaluation of upper calyx syndrome].

Upper calyx syndrome in children was first described in 1968. It may be caused by dysmorphy, organic narrowing and vascular compression. The purpose of this report is estimation the frequency of this syndrome in children with chronic pyelonephritis, its clinical significance and determination the test of roentgenological diagnosis. In 21 cases (5% children with chronic pyelonephritis) there were changes in upper calyx. The main cause of this changes was vascular compression (4,3%). Clinical significance of upper calyx syndrome is big, because in all the cases there was chronic infection of genitourinary tract. The roentgenological signs of upper calyx syndrome are; obstruction at the infundibulum, significant distending of calyx and delayed emptying at intravenous pyelography.