Roentgenogram of the month.
D003937:Diagnosis, Differential; D006801:Humans; D006872:Hydropneumothorax / Q000209:etiology; D008175:Lung Neoplasms / Q000175:diagnosis*; D008654:Mesothelioma / Q000175:diagnosis*; D008875:Middle Aged; D009362:Neoplasm Metastasis / Q000175:diagnosis; D010997:Pleural Neoplasms / Q000175:diagnosis*; D013902:Radiography, Thoracic