<prompt> Earliest lesion seen in asbestosis is:Pleural plaquesHilar lymphadenopathyAdenoma lungMesothelioma  <response>: It is the most common manifestation of asbestosis exposure composed of plaques of dense collagen containing calcium.they are usually asymptomatic and develop on anteroir and postereolateral pas of parietal pleura and over diaphragm.ref Robbins 9e p691 