[Eosinophilic cystitis]. / Cistitis eosinófilica.

Eosinophilic cystitis is an uncommonly diagnosed disease entity whose etiology is unknown, although factors favoring its presentation such as disorders due to hypersensitivity and associated vesico-prostatic disease have been mentioned. Four cases are presented. The clinical features, complementary tests, treatment, and course are discussed and the literature reviewed.