A case of BCG sepsis with bone marrow and liver involvement after intravesical BCG instillation.

The case described concerns a 68-year-old male patient, who received intravesical BCG instillations for non-resectable urothelial carcinoma (stage pT1, G2). After the third instillation, which was complicated by hematuria during catheterization, he had a high temperature, dyspnoea, a weight-loss of 15 kg and critical recurrent hypotension for 3 weeks. On admission to the clinic he presented with high serum liver enzymes and pancytopenia. The suspected diagnosis of BCG sepsis was confirmed by the detection of typical granulomas in liver and bone marrow histology. After initiation of tuberculostatic therapy, the patient's condition improved and laboratory results returned to normal. This case shows the potential of a life-threatening systemic side effect after intravesical BCG instillation.