[Multisystem disease caused by BCG imitating miliary tuberculosis].

As the prevalence of tuberculosis is on the rise in western countries, we present a 79-year-old man who developed a pulmonary tuberculosis-like syndrome following immunotherapy with BCG for carcinoma of the urinary bladder. The symptoms subsided following 3-drug antitubercular treatment, and the addition of steroids following negative cultures for Mycobacterium tuberculosis. The course of this disease, named BCG-osis, is much more favorable than miliary tuberculosis, even with milder treatment. It is important to keep in mind this phenomenon now that there is increasing treatment of cancers with BCG.