Abstract: To the Editor:Dieulafoy's disease is characterized by the tortuous arteries of abnormally large caliber running within the submucosa,which is susceptible to ulceration and bleeding.This vascular abnormality usually occurs in the gastrointestinal tract.The involvement in the respiratory system is rare.Massive hemoptysis caused by Dieulafoy's disease of the bronchus is a life-threatening condition.An immediate and effective treatment is required in emergency to improve survival.Here,we report a patient who had such a vascular anomaly in bronchus and presented with recurrent massive hemoptysis.The patient signed information consent form.