. The American journal of roentgenology, radium therapy and nuclear medicine . ltrative type arises from thebronchus, and infiltrates the lung alongthe bronchial ramifications, causing anincreased density of the lung markings,or it may involve the surrounding lungtissue and be seen as a mass with fairlysmooth edges, except for the advancingmargin, which is irregular. A number of other observers recognizetwo di\isions of cancer, namely, that of alobe and that of the hilus, also that hilarlesions predominate over lobar, and thatthe majority of hilar lesions invade theparenchyma in their progress
. The American journal of roentgenology, radium therapy and nuclear medicine . ltrative type arises from thebronchus, and infiltrates the lung alongthe bronchial ramifications, causing anincreased density of the lung markings,or it may involve the surrounding lungtissue and be seen as a mass with fairlysmooth edges, except for the advancingmargin, which is irregular. A number of other observers recognizetwo di\isions of cancer, namely, that of alobe and that of the hilus, also that hilarlesions predominate over lobar, and thatthe majority of hilar lesions invade theparenchyma in their progressive develop-ment. The writer reports 2 cases of primarycarcinoma of the lung, verified by necropsyand pathological examination. One of thesecases is presented through the courtesy ofDr. Bronsis of the Jewish Relief Society(Fig. 6). The metastatic deposits of cancer maybe general in both lungs, or confined to onelung. The lesions on the .x-ra\ plate con-sist of general nodulations in the lung orlocalized deposits in the line of the lungmarkings, generallv involving the lower. Fig. 7. Metastatic carcinoma of lungs secondary tocarcinoma of stomacli. Vcritied post mortem. half of the lung, and apparently startingfrom the hilus. The appearance of metas-tatic deposits is practically that men-tioned for primary lesions and a carefulnecropsy may be necessary for differentia-tion, provided the clinical history does notgive convincing evidence (Fig. 7). Where the pleura is primarily involvedin the metastasis before the lesions aredemonstrated in the lung, the first signdetected may be only a restricted mo-tion of the diaphragm on the affectedside. Metastasis of the lung is comparativelyfrequent, especially secondary to car-cinoma of the breast, and if an x-rayexamination were made in all cases of thislatter disease, some radical operations forthe removal of the breast would be deemedinexpedient. i8o New Growths Within the Chest: X-Ray Diagnosis In the differentiation between benignand ma
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