[Pulmonary artery aneurysm and thrombosis caused by vasculitis in Behçet's disease].

Behcet's disease in a 27-year-old male is described. The patient presented fever, dyspnea and hemoptysis. A chest X-ray revealed right hilar enlargement. Exploratory thoracotomy revealed a pulsating mass in the superior lobar artery consistent with aneurysm. Pulmonary biopsy confirmed necrotizing vasculitis of the tissue consistent with Behcet's disease. Pulmonary arteriography showed and aneurysmatic enlargement of the bifurcation between the mid and righ inferior lobar arteries, with thrombosis of the upper right and lower left lobar arteries. Resolution of symptoms was achieved through treatment with corticoids and azathioprine.