Immunologic induction of malignant lymphoma: graft-vs-host reaction-induced B cell lymphomas contain integrations of predominantly ecotropic murine leukemia proviruses.

The induction of a graft-vs-host reaction in (BALB/c X A)F1 mice by i.v. injection with BALB/c lymphoid cells leads to a lymphoid hyperplasia that may progress to malignant lymphoma.