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:: (A) Mesothelioma, (B) Lobular collapse, (C) Bronchogenic carcinoma, (D) Round atelectasis
Answer is A. 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