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Figure 4: Ventilation perfusion scan and computed tomography angiography in a patient with pulmonary hypertension due to fibrosing mediastinitis and absent flow to the right lung. (a) The lack of perfusion on the right lung. (b) An obstruction of the right main pulmonary artery (white arrow) due to fibrosing mediastinitis. Note the calcified adenopathies and fibrotic tissue. L = left lung, PA = pulmonary artery, R = right lung

Figure 4: Ventilation perfusion scan and computed tomography angiography in a patient with pulmonary hypertension due to fibrosing mediastinitis and absent flow to the right lung. (a) The lack of perfusion on the right lung. (b) An obstruction of the right main pulmonary artery (white arrow) due to fibrosing mediastinitis. Note the calcified adenopathies and fibrotic tissue. L = left lung, PA = pulmonary artery, R = right lung