[Eosinophilic cystitis].

The author reports a case of severe disturbance of micturition due to a cystitis in a 17 years old adolescent. As no cause was found, a biopsy was taken by endoscopy which revealed an inflammatory process involving the full thickness of the bladder wall with a great many eosinophils. The particular interest of this case presentation resides in the effectiveness of the immuno-suppressive treatment. Three tablets of Imuran for six weeks led to the cure of this patient. The authors review the literature of this rarely published condition. They classify it into the broader group of interstitial cystitis. The authors cite their case as an argument in favour of the auto-immune origin of these interstitial cystitis. The effectiveness of immuno-suppressive therapy is the best proof.