LUNG - Pneumoconiosis

Each specimen is a slice of lung, dark in colour and showing numerous circumscribed black nodules, up to 0.5 cm. in diameter; in some areas, each shows a periphery of white scar tissue. On the pleural surface of each specimen there is a scar associated with a black lesion. The nature of the irritant in the lungs has not been established, but this man was a welder for many years.