Figure 4.

Gough Wentworth paper- mounted thick sections of the entire lung of a non-smoking non-miner (left) and a coal miner with cavitating progressive massive fibrosis (right). The left hand lung shows some centri-acinar dust accumulations in the upper parts related to air pollution but is otherwise normal. The miner’s lung shows the dark pigmentation of coalmine dust with emphysema and almost total destruction of the upper lobe with apical pleural thickening. (with permission from Ingelheim portfolio 11 Lung sections).