Eosinophilic Cystitis: An Uncommon Form of Cystitis

Abstract
Since 1959, 39 cases of eosinophilic cystitis were reported. Eosinophilic cystitis is a rare form of allergic cystitis in patients who usually have a strong allergic history. It mimics other forms of intractable cystitis, such as interstitial cystitis, tuberculosis and bladder neoplasms. It is caused by various antigens that form immune complexes at the bladder level and stimulate eosinophilic infiltration. Food allergens, medications, topical agents and parasites were implicated. The diagnosis is made by excluding all other forms of cystitis.