<prompt> Bilateral pleural plaques and pulmonary fibrosis involving bases is hallmark ofAsbestosisSilicosisSclerodermaByssinosis  <response>: Ans. a Asbestosis Ref. Graingers Diagnostic Radiology, 4th ed., 513; TABLE 24-3X-RAY FEATURES OF ASBESTOS EXPOSUREPleuralPulmonaryExtrathoracic Plaques Fibrosis asbestosis Peritoneal mesothelioma Diffuse thickening Bronchial carcinoma Other extrathorasic malignancies Effusions Round atelectasis pseudotumour Mesothelioma 