Hemorrhage in a patient with Bronchial Dieulafoy's disease and associated pulmonary fibrosis: A case report.

Background: Bronchial Dieulafoy's disease (BDD) is a rare vascular anomaly that was first described in 1995. The main symptom is recurrent hemoptysis. It can be diagnosed through angiography, bronchoscopy, and sometimes histology and endobronchial ultrasound scan (EBUS). Treatment includes embolization and surgery. Case presentation: A 77-year-old male with dyspnea and CT scan revealing an interstitial pattern underwent bronchoscopy for bronchoalveolar lavage (BAL). During bronchoscopy, a protruding white non-pulsatile lesion was biopsied. The biopsy triggered a massive hemorrhage, which required an embolization procedure. Bronchial Dieulafoy's disease was diagnosed. There was no need for surgery in this case. The interstitial pattern was diagnosed as idiopathic pulmonary fibrosis. Conclusions: This report describes a novel case of BDD leading to bronchial hemorrhage. Considering the endoscopic differential diagnosis, including rather frequent carcinoid tumor and broncholithiasis, we highlight the need for extreme caution when considering endoscopic biopsy of protruding white lesions. Indeed, biopsy - or even contact - with a BDD lesion is frequently associated with massive hemorrhage. According to our review, BDD is the most hemorrhage-prone lesion when biopsied, associated with significant bleeding in 90% of cases and 30% mortality, compared with significant bleeding in only 2.6% of carcinoid tumors and 3.1% of broncholithiasis cases.This case of BDD is also original since associated with idiopathic pulmonary fibrosis. It is to our knowledge the first time that such an association has been reported.