Eosinophilic Cystitis Presenting as Invasive Bladder Cancer: Comments on Pathogenesis and Management

Abstract
Eosinophilic cystitis is a rare bladder lesion that usually presents with hematuria and has the cystoscopic appearance of a bladder tumor. Ten cases (only 4 adults) have been reported in which this disease has presented with a palpable mass. We report a case in which the lesion presented as an invasive bladder tumor with a palpable mass in an adult and comment on the possible etiology.