Fig. 3From: Value of HRCT of the chest in evaluation of ankylosing spondylitis: correlation between pleuro-parenchymal abnormalities and disease activity36 years male complaining of dyspnea on exertion (15 years disease duration) a–c Axial HRCT images showing right upper lobe fibrosis (arrowhead) (a), bronchial wall thickening, middle lobe and bilateral lower fibrotic changes (arrows) (b, c). d Axial mediastinal window image showing left pleural thickening (circle)Back to article page