CHRONIC ALLOGENEIC DISEASE

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Abstract
The incidence of lymphomas in 371 CAF1 mice injected with BALB/c spleen cells was compared with that in 324 control CAF1 mice. A high incidence of lymphomas was found in the treated mice, but not in the control animals. The development of the neoplasms was a function of the number of parental cells administered. Analyses of the injected mice for the presence of donor cells indicated that the majority of the injected parental cells lost antihost activity, probably within 24 hr of their administration. The tumors were of host origin, as judged by transplantation tests and antigenic analysis of tumor cells.