<prompt> Chest X-ray of an industrial worker exposed to asbestos for 20 yrs shows diffuse appearance of lower lobe with comet tail infarct on PA view. The most likely diagnosis is:MesotheliomaLobular collapseBronchogenic carcinomaRound atelectasis  <response>: This is a case of mesothelioma secondary to asbestos exposure. The diffuse appearance of lower lobe with comet tail infarct is typical of mesothelioma. Ref: Aicle: The Comet Tail Sign1; 1999 