Behcet's disease presenting with pulmonary thromboembolism.

Behcet's disease is a chronic inflammatory multi-systemic vasculitis. Recurrent oral and genital aphthous ulcers, uveitis, arthritis, arterial aneurysms, venous thrombosis, gastrointestinal system lesions and skin lesions can be seen. Large, medium or small arteries and veins may be involved. While venous lesions cause occlusion, arterial lesions can cause both occlusion and aneurysm. Major forms of pulmonary involvement include pulmonary artery aneurysm, arterial and venous thrombosis, pulmonary infarction, recurrent pneumonia, and pleurisy. In Behcet's disease, pulmonary thromboembolism (PE) is often associated with endothelial damage. Neutrophils play an important role in the pathogenesis of thrombosis. Coagulation components such as fibrinogen, thrombin, factor Xa and factor VIIa activate the inflammatory cascade and induce vascular events. It is important to understand the pathogenesis of vascular events in determining the effective treatment strategy. Here we present a patient with Behcet's disease who was presented with pulmonary embolism and was investigated for the etiology of thrombosis.