Murine Radiation Myeloid Leukaemogenesis: A Possible Role for Radiation‐Sensitive Sites on Chromosome 2

There is a paucity of informative data on the potentially important role of specific sites of chromosomal instability in oncogenic processes. Chromosome 2 deletions and rearrangements are known to characterise radiation‐induced acute myeloid leukae mia in the mouse. Here we statistically establish a concordance between chromosome 2 breakpoint clusters in these leukaemias and chromosome 2 rearrangements carried at a high in vivo frequency by progeny of irradiated haemopoietic cells. Mechanisms of radiation myeloid leukaemogenesis are discussed with respect to multiple radiation‐sensitive sites encoded on chromosome 2 and the possible influence of genomic imprinting on inductive processes.