[Emphysematous cystitis and emphysematous pyelonephritis].

Emphysematous cystitis and emphysematous pyelonephritis are rare entities, difficult to diagnose and with high morbidity and mortality. The non-specificity of the medical history and the little usefulness of laboratory tests contribute to diagnostic delay, which increases the possibility of therapeutic failure. We present 2 cases, one of cystitis and another of emphysematous pyelonephritis, who attended the emergency room due to severe urinary sepsis. Despite severity of the symptoms, conservative management was performed with bladder drainage and antibiotic treatment, without interventions or surgeries, presenting a favorable evolution and resolution of the infectious process. Each case must be individualized to offer the best possible therapeutic alternative.