PMC7268114_01
(A) HRCT scan showed interstitial lesions, multiple fibrosis and a small number of nodules in both lungs. Partial atelectasis and narrowing of the bronchus in the upper left lung were observed. No signs of bronchiectasis were found. (B) CTPA showed that the pulmonary artery stenosis in the right lower pulmonary artery was caused by external pressure, and no pulmonary embolism was found. (C) Bronchoscopy of the right lung shows smooth and pulsatile nodular lesions located in the region of the right middle lobe bronchus. The lesion arose from the surface with absolutely normal mucosa, without evidence of active bleeding. (D) CT angiography shows a right bronchial artery arising from the thoracic aorta, from which a branch supplied the pulmonary circulation, and the bronchial arteries on both sides were dilated and tortuous.. CT, computed tomography; CTPA, computed tomography pulmonary artery imaging; HRCT
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There was no evidence of bronchiectasis (Figure 1A). Because of the hypoxemia, a computed tomography pulmonary artery imaging (CTPA) was performed and revealed that pulmonary artery stenosis in the right lower pulmonary artery was caused by external pressure, and no pulmonary embolism was found (Figure 1B). The protrusion arose from the surface with absolutely normal mucosa, without evidence of active bleeding (Figure 1C). Selective bronchial arteriography was consequently performed, and showed elongated, tortuous, and dilated branches of the bronchial artery in the region of the middle lobe bronchus (Figure 1D).