[A case report of tracheobronchial Dieulafoy's disease].

Tracheobronchial Dieulafoy's disease (TBDD) is a rare bronchial artery vascular malformation, characterized clinically by sudden, recurrent, and life-threatening massive hemoptysis. This article reports the case of a 9-year-old female patient who presented with massive hemoptysis lasting two weeks. Following ineffective treatment at a local hospital, she was transferred to our institution. Bronchoscopy revealed a smooth, submucosal protrusion at the orifice of the right lower lobe basal segment. Digital subtraction angiography (DSA) revealed tortuous bronchial arteries near the lesion, indicating a caliber-persistent artery malformation. Following embolization with Onyx, the patient's hemoptysis resolved, and follow-up bronchoscopy confirmed the disappearance of the lesion.