SARCOIDOSIS vs SILICOSIS
42-year-old cement worker presents with dyspnea .
A CXR performed 5 years prior was close to normal with possible right hilar prominence.
CT scan 5 years Later
The CT scan, shows diffuse micronodular lung disease predominantly in the upper lobes with mediastinal widening consistent with mediastinal lymphadenopathy, dominant in the right paratracheal region and in the subcarinal region.
Lung Windows
Lung windows show the presence of extensive diffuse micronodular disease accumulating along lymphatics along fissures and pleural surfaces, and along the bronchovascular bundles. Although there is diffuse disease, the upper lobes are slightly more involved than the lower lobes. The extensive thickening along bronchovascular bundles, lymphovascular associations and prominent adenopathy favors a diagnosis of sarcoidosis but with a work history of being a cement worker, silicosis still remains in the differential diagnosis as a less likely possibility.