This does however not exclude possible effects manifested at a pre-leukemic stage in which case it is a formal possibility that cells harboring Cd74 proviral insertions are not selected for during tumor outgrowth in analogy to that seen for c-myb activation in T-cell lymphomas induced by Moloney MLV in BALB/c mice [62]. The gene discussed is MYB; the disease is T-cell non-Hodgkin lymphoma.