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"ASBESTOS-RELATED LUNG DISEASE"

“ This refers to a spectrum of lung disease resulting from asbestos exposure. It may be a benign pleural disease, usually occurring >20 y...

This refers to a spectrum of lung disease resulting from asbestos exposure. It may be a benign pleural disease, usually occurring >20 years after exposure. More common in males (occupational).
PLAIN FILM
•  Pleural effusion first.
•  Then, often (80%) pleural plaques affecting both parietal pleura (posterolateral/lateral/costophrenic angles/mediastinal).
•  Diaphragmatic plaques are pathognomonic, the apices are spared.
•  Plaques are not always calcified.
CT 
•  Look for areas of round atelectasis (‘pseudotumour’ appearance) next to a pleural plaque. The bronchovascular bundle typically converges into the lesion (‘comet tail’ sign).
Rounded atelectasis. CT images demonstrating calcified pleural plaques with rounded atelectasis (pseudotumour; red arrow) overlying a calcified pleural plaque (white arrow). The bronchovascular bundles form the comet tail sign (red arrow).