RESUMO
Eosinophilic cystitis is a very rare clinical disease entity in the pediatric population. We report two cases of Filipino children with eosinophilic cystitis who presented with irritative voiding symptoms, gross hematuria, peripheral eosinophilia, and hydroureteronephrosis and urinary bladder wall thickening visualized on ultrasonography and CT urography. Cystoscopy and transurethral biopsy confirmed the diagnosis. Both patients were started with corticosteroid with or without an antihistamine. Resolution from the signs and symptoms were observed in both patients as documented by disappearance of peripheral eosinophilia, normal urinalysis results, and resolution of the hydroureteronephrosis and urinary bladder wall thickening on ultrasonography on follow-up.