Silicosis chest x ray: Difference between revisions
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==Overview== | ==Overview== | ||
==Chest X Ray== | ==Chest X Ray== | ||
A chest radiograph is obtained in virtually all patients undergoing evaluation for silicosis | *A chest radiograph is obtained in virtually all patients undergoing evaluation for silicosis Chest x-ray will confirm the presence of nodules in the lungs, especially in the upper lobes. *In acute silicosis, the chest radiograph demonstrates characteristic bilateral, diffuse ground glass opacities [42,51,52]which may be perihilar or basilar [53]. These features may progress from a pattern of lower zone opacities to large masses of coalesced parenchymal tissue in the mid and lower zones, which are typically bilateral but not always symmetrical [42,53]. | ||
In acute silicosis, the chest radiograph demonstrates characteristic bilateral, diffuse ground glass opacities [42,51,52]which may be perihilar or basilar [53]. These features may progress from a pattern of lower zone opacities to large masses of coalesced parenchymal tissue in the mid and lower zones, which are typically bilateral but not always symmetrical [42,53]. | *The typical chest radiograph finding in chronic simple silicosis is the presence of many small round opacities of less than 10 mm in diameter, distributed predominantly in the upper lung zones. Progressive massive fibrosis (PMF, also known as conglomerate silicosis) occurs when these small opacities gradually enlarge and coalesce to form larger opacities of more than 10 mm in diameter [22]. As these opacities progressively enlarge, the hila are retracted upward in association with upper lobe fibrosis and lower lobe hyperinflation. The opacities of PMF can be asymmetrical, and may mimic a neoplastic process. Hilar adenopathy with prominent eggshell [[calcification]] is present in up to 5 percent of workers with silicosis. In rare cases, pulmonary nodules may also be calcified. Cavitation may also be present in advanced disease or in the setting of mycobacterial superinfection. | ||
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Revision as of 14:54, 19 June 2015
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Chest X Ray
- A chest radiograph is obtained in virtually all patients undergoing evaluation for silicosis Chest x-ray will confirm the presence of nodules in the lungs, especially in the upper lobes. *In acute silicosis, the chest radiograph demonstrates characteristic bilateral, diffuse ground glass opacities [42,51,52]which may be perihilar or basilar [53]. These features may progress from a pattern of lower zone opacities to large masses of coalesced parenchymal tissue in the mid and lower zones, which are typically bilateral but not always symmetrical [42,53].
- The typical chest radiograph finding in chronic simple silicosis is the presence of many small round opacities of less than 10 mm in diameter, distributed predominantly in the upper lung zones. Progressive massive fibrosis (PMF, also known as conglomerate silicosis) occurs when these small opacities gradually enlarge and coalesce to form larger opacities of more than 10 mm in diameter [22]. As these opacities progressively enlarge, the hila are retracted upward in association with upper lobe fibrosis and lower lobe hyperinflation. The opacities of PMF can be asymmetrical, and may mimic a neoplastic process. Hilar adenopathy with prominent eggshell calcification is present in up to 5 percent of workers with silicosis. In rare cases, pulmonary nodules may also be calcified. Cavitation may also be present in advanced disease or in the setting of mycobacterial superinfection.
