Intravesical instillation of bacillus Calmette-Guérin is the elective treatment for transitional cell and in situ bladder carcinoma. Severe complications occur very seldom but must be known and promptly recognized. We present a case of miliary tuberculosis reactivation secondary to the mentioned treatment.

RESUMENTUBERCULOSIS MILIAR SECUNDARIA A INSTILACIÓN ENDOVESICAL DE BCG La instilación endovesical con bacilo de Calmette-Guerin es el tratamiento de elección para el carcinoma superficial e in situ de vejiga. En raras ocasiones presenta complicaciones graves que deben ser tenidas en cuenta. A continuación presentamos un caso de reactivación endógena de tuberculosis miliar secundaria a dicho tratamiento.Palabras clave: Neoplasias vesicales. Vacuna BCG. Tuberculosis. Efectos adversos. ABSTRACT MILIARY TUBERCULOSIS IN A PATIENT TREATED WITH BCG INTRAVESICAL INSTILLATIONIntravesical instillation of bacillus Calmette-Guérin is the elective treatment for trnasitional cell and in situ bladder carcinoma. Severe complications occur very seldom but must be known and promptly recognized. We present a case of miliary tuberculosis reactivation secondary to the mentioned treatment.