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The first part of this report gives a concise review of the content of the eleventh scientific report, which was reviewed in The Journal May 18. The most important new feature of this report is a table listing the strains of transplantable tumors maintained by the Imperial Cancer Research Fund. Twenty-eight strains are listed. The average success of grafting and the effect of reinoculation in positive animals with the same strain and with another are reported for each strain. The importance of the reinoculation behavior is understandable from the fact that it is bound up with the occurrence of spontaneous regression and the behavior of the tumors to changed environment and other conditions of growth. It was formerly shown by Russell and by Foulds that two distinct mechanisms may be responsible for the progressive growth of transplantable tumor strains. In some strains the parenchyma does not excite a significant degree
Thirty-Second Annual Report, 1933-1934, of the Imperial Cancer Research Fund. JAMA. 1935;105(4):307-308. doi:10.1001/jama.1935.02760300067034