This information was reviewed and approved by
Maura Robinson (5/1/2012).
Simple pneumoconiosis, usually detectable on chest imaging, may produce no symptoms and very little loss of lung function. The more complicated and severe form of pneumoconiosis known as Progressive Massive Fibrosis (PMF) leads to an increasing loss of lung function and respiratory symptoms of shortness of breath and cough with phlegm. Other organs, particularly the heart, may be affected.