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Pulmonary vascular abnormalities are important causes of hemoptysis. Arteriovenous malformation (AVM), pulmonary arterial aneurysms or invasion of the pulmonary arterial structures by the tumor may cause hemoptysis. Pulmonary artery aneurysms (PAA) are an infrequent disease of the pulmonary vasculature. Endovascular coil application is a convenient treatment option for the treatment of hemoptysis due to vascular anomalies. The migration of intravascular coil to another tissue is a rare complication. To review this extremely rare complication, herein we report two unusual cases who had pulmonary artery aneurysm and who had hemoptysis due to tumor invasion to pulmonary artery, initially treated with endovascular coil successfully. In both cases endovascular coil was migrated to the bronchus subsequently. Lobectomy may be performed in such cases with coil migration into the bronchus or conservative therapy with follow-up chest imaging may be a suitable treatment option for selected patients. The choice of treatment should be made individually for each patient considering the characteristics of the patients. In patients with coils, the biopsy can lead to massive hemorrhages that are fatal.

Intravascular coil migration to bronchus: review of the literature with two case reports