Eosinophilic cystitis in a 4-year-old boy: Successful long-term treatment with cyclosporin A

A 4-year-old Jewish boy presented with dysuria, urinary dribbling, increase d urinary frequency, and new onset of diurnal enuresis. An infiltrating sol id mass involving the entire bladder wall was found. Biopsy revealed "tumor -forming" eosinophilic cystitis, a rare bladder lesion of unclear cause. An titoxocariasis treatment was unsuccessful. High-dose corticosteroids failed . The child's clinical condition and bladder sonographic findings continued to deteriorate. Treatment with cyclosporin A was given for 8 months, with a complete clinical, radiologic, and histopathologic cure and no side effec ts. Two years of follow-up showed a complete recovery.