Primary hydatid cyst of the urinary bladder with associated eosinophilic cystitis: Report of a unique case.

Hydatid cyst of Echinococcus granulosus usually develops in liver and lungs of the affected individual and is considered a common health problem in endemic regions. Although, the cyst can be found in less common locations, such as brain, heart, and bones, the urinary bladder is extremely rare that may mimic malignancy radiologically and creates a diagnostic dilemma for clinicians and radiologists. Here we present a unique case of hydatid cyst in the urinary bladder with associated eosinophilic cystitis.