[Eosinophilic cystitis in children].

In a 4-year-old boy, cystitis in a pseudotumoral form with left ureterohydronephrosis wa discovered on the occasion of repeated urinary infections. Several biopsies were required to rule out a malignant tumor, and they showed that this condition was an eosinophilic cystitis. Healing was obtained with an anti-bilharzial treatment, although this child did not suffer form bilharziasis. A few similar cases were found in the literature. We note that the diagnosis is usually not established before biopsy, but the association of repeated urinary infections and of a vesical pseudotumoral syndrome with ureteral obstruction must lead to suggesting it, especially if the first biopsy does not reveal any tumor.