Transplantation of primary plasma cell tumor without 2,6,10,14- tetramethylpentadecane (pristane) treatment of the hosts.

Small inocula of primary plasma tumor cells which do not transplant i.p. unless recipients are conditioned with pristane do so readily when recipients are given i.p. injections of a peritoneal exudate induced by pristane inoculating, but free of pristane.