Cytomegalovirus-induced hemorrhagic cystitis following bone marrow transplantation.

Cytomegalovirus (CMV) is a common cause of morbidity and mortality following bone marrow transplantation but has not been demonstrated to cause hemorrhagic cystitis in this setting. We describe a patient who developed gross hematuria and lower abdominal pain 47 days after bone marrow transplantation was performed. Subsequently, CMV was detected in bladder endothelial cells with use of monoclonal antibody staining that was specific for the virus. No other cause for the patient's hemorrhagic cystitis was discovered. The gross hematuria and pain persisted until the patient received intravenous ganciclovir. This case demonstrates that CMV-induced hemorrhagic cystitis can occur following bone marrow transplantation and may respond to antiviral therapy.