. The American journal of roentgenology, radium therapy and nuclear medicine . he patient isgreatly improved. THE ADVANTAGES OF THE USE OF BURIEDEMANATION TUBES. The data furnished in this paper indicatethat radium exerts a truly specific selective action on cancer tissue. Biologically, then,radium therapy in cancer has a thoroughlyscientific foundation and presents the near-est approach to a specific therapeutic meas-ure against the disease. In practice, however,the action of radium has its limitations, andthe results obtained thus far vary in accord-ance with the size and location of the tum
. The American journal of roentgenology, radium therapy and nuclear medicine . he patient isgreatly improved. THE ADVANTAGES OF THE USE OF BURIEDEMANATION TUBES. The data furnished in this paper indicatethat radium exerts a truly specific selective action on cancer tissue. Biologically, then,radium therapy in cancer has a thoroughlyscientific foundation and presents the near-est approach to a specific therapeutic meas-ure against the disease. In practice, however,the action of radium has its limitations, andthe results obtained thus far vary in accord-ance with the size and location of the effectiveness of the rays diminishes ininverse ratio to the increase of the distanceand the size of the tumor. A preliminary sur-gical removal of the main mass of the tumor,even when radical surgery is impossible,diminishes the difficulties in connection withthe size of the tumor. The placing of the ra-dium in near approximation to or within thetumor does away with the disadvantageswhich are presented by a greater distancebetween the source of radiation and Fig. 13. Roentgenogram. Sarcoma of ClavicleAFTER Application of Radium. Shows new^ boneformation. A new method was recently developed byDuane of Boston which obviates to a greatextent the difficulties created both by thesize and location of the tumor. It consists inthe use of buried radium emanation tubes. The Rationale of Radiumtherapy in Cancer 561 Each minute glass tube contains not morethan about 3 millicuries. A sufficient numberof the tubes is buried in the tumor to coverits whole mass and is left there emanation decays after a time and thetubes become inert. While this method is simpler and fre-quently more efficient than the external ap- external application of radium in combina-tion with incomplete surgery and become themethod of choice in many conditions. Themethod of buried emanations should alwaysbe accompanied, however, by external appli-cation in the areas of the regional lymph
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