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Table 1 Summary (frequency and percentage) of HRCT thoracic findings

From: Value of HRCT of the chest in evaluation of ankylosing spondylitis: correlation between pleuro-parenchymal abnormalities and disease activity

HRCT thoracic finding Frequency Percentage
Summary of HRCT thoracic findings in our study   
Upper lobe fibrotic changes 9 30.0
Middle lobe fibrotic changes 9 30.0
Lower lobe fibrotic changes 20 66.7
Emphysema 3 10.0
Lung cysts 2 6.7
bronchial thickening 13 43.3
Lung nodules 6 20.0
Air trapping 2 6.7
Lung hyperlucency and hyperinflation 15 50.0
Pulmonary artery dilatation 0 0.0
Pleura thickening 6 20.0
Pleural effusion 0 0.0
Mild pericardial thickening 1 3.3
Other findings   
Kyphosis 12 40
Facetal ankylosis 23 76.6
Squaring of vertebrae 7 23.3
Ligamentous ossification 7 23.3
Chalk stalk fracture 2 6.7
Fatty atrophy of back muscles 9 30