Asbestos Exposure Frans Naude.

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Presentation transcript:

Asbestos Exposure Frans Naude

Pneumoconioses Fibrotic Non fibrotic Silicosis, coal worker pneumoconiosis, asbestosis, berylliosis, talcosis Non fibrotic Siderosis Stannosis baritosis

Asbestos Exposure Inhalation of asbestos fibers Pleural Pulmonary Extra thoracic Pleural plaque Diffuse pleural thickening Pleural effusions Malignant mesothelioma Fibrosis (asbestosis) Bronchial carcinoma (usually in lower zones) Round atelectasis (pseudo tumor) Peritoneal mesothelioma Other extra thoracic malignancies

Asbestosis Def : diffuse interstitial pulmonary fibrosis that occurs secondary to the inhalation of asbestos fibers

Diagnostic imaging chest I 2-38

Radiography May be normal (10-20%) Peripheral lower zone predominance Irregular reticular or small nodular opacities "Shaggy" cardiac silhouette in advanced disease Late: Endstage honeycombing Pleural plaques (25%) Lung cancer: Lower zone predominance in contrast to the upper zone predominance in the general population of smokers Progressive massive fibrosis extremely rare

Small subpleural nodules (straight arrows), Patchy ground-glass opacities (curved arrows), Interlobular septal thickening (arrowhead) suggestive of early-stage asbestosis.

Pleural plaque : band like pleural thickening (arrowheads) in the lower lobe of both lungs

Asbestosis : subpleural consolidation (arrow) in the lower lobe of the left lung, with reticulation, ground-glass opacities, and honeycombing

Pt with asbestos exposure: subpleural consolidation (arrow), pleural thickening (arrowheads) and effusion.

Parenchymal bands in asbestosis Webb

Subpleural Lines curvilinear opacity a few millimeters or less in thickness, less than 1 cm from the pleural surface nonspecific indicator of atelectasis, fibrosis, or inflammation more common in patients who have asbestosis than in those who have IPF or other causes of UIP

Asbestosis VS idiopathic pulmonary fibrosis IPF more basal and sub pleural fibrosis presence of parietal pleural thickening in association with lung fibrosis is the most important feature differentiating asbestos- induced pulmonary fibrosis from IPF asbestos bodies in bronchoalveolar lavage fluid

Case H/O asbestos exposure

References RadioGraphics 2006; 26:59–77 Pneumoconiosis: Comparison of Imaging and Pathologic Findings Diagnostic imaging chest I 2-38 High-Resolution CT of the Lung -webb