The incidence of mediastinal pleural involvement and thickening in MPM, OMPD and benign pleural disease (BPD) was 52%, 20.4% and 0%, respectively.

• 环绕形胸膜增厚在MPM、OMPD的发生率分别为52%25、20.；4%25；良性胸膜病变(BPD)则无一例出现此征象。