[Is it necessary to use an isotopic diuretic renogram in grade II pyelocaliceal dilatations diagnosed with ultrasonography?].
OBJECTIVE
The increasing number of ultrasonographically detected asymptomatic, renal dilations have caused a lot of explorations to be performed in these patients. The Society of Fetal Urology proposed a four grades classification of echographic renal dilations and renographic studies are recommended in grades II to IV. However we have observed that grade II dilations don't evolve to obstruction. The aim of this work is to evaluate the obstruction rate in this group of patients, and the necessity or not of practising diuretic renography.


METHODS
We studied 42 children diagnosed of grade II renal dilation during a 1.5 year period. Left side was more frequently affected, 23 cases, 7 cases were bilateral what means 49 affected renal units. There was a male predominance (69%). Mean age at diagnosis was 2 months (0 to 36 months). Seventy nine per cent were prenatally diagnosed.


RESULTS
The MAG-3 renal scan showed 48 unobstructed renal units and 1 obstructed. The F-15 variant was made in 15 cases by a doubtful curve or retarded elimination. The patient with obstructive curve presented an 15 mm renal pelvic diameter echographically measured and the intravenous urography showed a higher dilation being operating on. The mean time follow up was 23.5 months (13 to 53 months) without any change.


CONCLUSIONS
Grade II pielocalicial dilations with renal pelvis lesser than 15 mm can be echographically controlled without renal scan. It should be performed only if renal dilation increases.
Gómez Fraile
A
A
Sección de Urología Pediátrica, Servicio de Cirugía Pediátrica, Hospital Universitario Materno-Infantil 12 de Octubre, Madrid.
Aransay Brantot
A
A
Delgado Muñoz
D
D
López Vázquez
F
F
Serrano Hernández
C
C
Manrique Legaz
A
A
D002675:Child, Preschool; D004108:Dilatation, Pathologic; D004231:Diuresis; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007670:Kidney Calices / Q000473:pathology; D007674:Kidney Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D011866:Radioisotope Renography; D012720:Severity of Illness Index