“…Pleural fibrosis is most commonly caused by asbestos exposure and may follow asbestos-related benign pleural effusion,1 tuberculous pleural effusion, haemothorax, use of ergot derivatives, and occasionally rheumatoid pleurisy, uremic pleuritis or coronary artery bypass graft surgery; rarely it may remain idiopathic,1 , 2 occasionally in a familial context 3 , 4. Mediastinal fibrosis may develop as a consequence of histoplasmosis or tuberculosis, or rarely actinomycosis, syphilis, aspergillosis, sarcoidosis, silicosis or methysergide exposure, or it may remain idiopathic 5.…”