1. Transplantation of 33 human tumors into the cheek pouch of cortisone-treated hamsters has resulted in the ‘survival” of 70 per cent of the tumors for periods exceeding 12 days.

  2. One epidermoid carcinoma, now called “Deac-1,” holds promise of being permanently transplantable. It has now been carried through sixteen generations of hamsters in a 9-month period.

  3. Factors concerned in the eventual transplantation of other human neoplasms are briefly discussed, and possibilities for immediate clinical application of experimental data are suggested.


This work was supported by funds from the American Cancer Society and United States Atomic Energy Commission Contract AT(30-1)-901 with the New England Deaconess Hospital.

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