. Journal of roentgenology . No. 12. Simple pleurisy with effusion of right lower thorax. Note the samedense shadow that occurs with malignant effusion. Differentiation cannotbe made with the x-ray alone. The clinical course of rapid recurrence ofmalignant effusion, as compared with simple effusian is most frequentlythe differential point. Cytodiagnosis is also of some help, although thereare frequently simple and tuberculous pleurisies that are hemorrhagic innature. No. 13. Gumma of lung. Note the extension of the gumma directly from themediastinum into the middle third of the chest; its decr
. Journal of roentgenology . No. 12. Simple pleurisy with effusion of right lower thorax. Note the samedense shadow that occurs with malignant effusion. Differentiation cannotbe made with the x-ray alone. The clinical course of rapid recurrence ofmalignant effusion, as compared with simple effusian is most frequentlythe differential point. Cytodiagnosis is also of some help, although thereare frequently simple and tuberculous pleurisies that are hemorrhagic innature. No. 13. Gumma of lung. Note the extension of the gumma directly from themediastinum into the middle third of the chest; its decreased density andincreased mottling, as compared with malignancy. The clinical course,W assermann examination, etc., are important aids in differentiation. 206 THE JOURNAL OF ROENTGENOLOGY. No. 14a. Pneumothorax of left chest. Note the collapsed lung opposite theheart shadow, which might be mistaken for malignancy. Eemainder ofleft chest, free from lung markings, however, is proof of its being apneumothorax.
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