[Cystitis emphysematosa (author's transl)].

Two cases of cystitis emphysematosa are described and the literature is reviewed. The aetiology, course and diagnosis are discussed, the radiological appearances being of particular importance. The cystoscopic and laboratory findings are mentioned. Cystitis emphysematosa is analogous to other conditions which cause gas to collect in abdominal organs and has similar aetiological factors.