This case illustrates the potentially aggressive behavior of mesotheliomas, not only within the chest but also extending into the chest wall and into the liver. 

Histology

The appearances are of thickened pleura some of which at least is parietal. The following changes are seen.  Organizing fibrinous pleurisy, epithelioid malignant mesothelioma,  sarcomatoid malignant mesothelioma and fibrous pleural plaques. 

DIAGNOSIS: malignant mesothelioma.