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A 53-year-old patient with fibrosing mediastinitis. a) Anterior and b) posterior views from a perfusion scintigraphy scan show multiple segmental perfusion defects (arrows). c) Volume-rendered computed tomography angiography and d) magnetic resonance pulmonary angiography demonstrate attenuated pulmonary vasculature (arrows) with calcified mediastinal lymph nodes (arrowhead).
