The commonest cause is asbestosis.
This tends to be bilateral and spare the costophrenic angles
So, if the pleural calcification is unilateral consider:
- previous haemothorax
- previous TB pleuritis
- previous empyema
Other differentials to consider are:
- previous radiotherapy/radiation exposure
- post talc pleurodesis, which will mimic calcification.
Lets return to a full-speed gallop to our last battle of the day, pseudoxanthoma elasticum