Eosinophilic cystitis. Report of 4 cases

OBJECTIVE: The etiopathogenesis, clinical features, diagnosis and treatment of eosinophilic cystitis are discussed. METHODS/RESULTS: 4 cases of eosinophilic cystitis are described. Patient follow-up ranged from 4 to 6.5 years. All patients are currently asymptomatic. Except for one patient who required hospitalization on several occasions due to hematuria secondary to cystitis, the remaining patients had an exceptional episode. CONCLUSIONS: Eosinophilic cystitis is an inflammatory condition whose etiopathogenesis remains to be elucidated. Its natural history is usually unpredictable and treatment is rarely effective. Eosinophilic cystitis has been associated with other allergic disorders and has been reported in patients with BPH and carcinoma of the bladder.