Sections View Full Chapter Figures Tables Videos Annotate Full Chapter Figures Tables Videos Supplementary Content + Download Section PDF Listen ++ For further information, see CMDT Part 9-32: Occupational Pulmonary Diseases + Key Features Download Section PDF Listen +++ ++ An occupational pulmonary disease resulting from macrophages ingesting inhaled coal dust Cigarette smoking may have an additive detrimental effect on ventilatory function + Clinical Findings Download Section PDF Listen +++ ++ Simple coal worker's pneumoconiosis is usually asymptomatic Pulmonary function tests may be normal Complicated disease, "progressive massive fibrosis," resembles complicated silicosis, with conglomeration and contraction in upper lung zones + Diagnosis Download Section PDF Listen +++ ++ Chest radiograph shows diffuse small opacities prominent in upper lungs + Treatment Download Section PDF Listen +++ ++ Supportive