. The American journal of roentgenology, radium therapy and nuclear medicine . ■ / n. ■.» tT;u: &J~. Fig. 7. Low-power view of epidermoid carcinoma inlymph node four weeks after intensive externalradiation. Note extreme fibrosis. necessary if beta radiation were dependedon entirely, and probably explains thefailure to produce satisfactory and lastingresults by the use of very weak tubes— mc. to mc. The total amount ofgamma radiation produced by them is notsufficient to do more than cause a tem-porary regression of all the malignantcells. The tissue changes taking place outsidethe zone o
. The American journal of roentgenology, radium therapy and nuclear medicine . ■ / n. ■.» tT;u: &J~. Fig. 7. Low-power view of epidermoid carcinoma inlymph node four weeks after intensive externalradiation. Note extreme fibrosis. necessary if beta radiation were dependedon entirely, and probably explains thefailure to produce satisfactory and lastingresults by the use of very weak tubes— mc. to mc. The total amount ofgamma radiation produced by them is notsufficient to do more than cause a tem-porary regression of all the malignantcells. The tissue changes taking place outsidethe zone of necrosis about an emanationtube are both interesting and tumor cells show marked degenerativechanges, irregular areas of necrosis, hyper-trophy of cells and hydropic degenerationwith hyperchromatism of cell nuclei. Inaddition, there is constantly a very markedlymphocytic infiltration. This suggeststhat the effect of radium is not entirely adestructive process directly, but that itstimulates to a marked degree the greatestnatural factor in the bodys defens
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