Translocation (6;9)(p23;q34) in smoldering leukemia and acute nonlymphocytic leukemia.

Two further cases with myeloproliferative disorders (a child with smoldering leukemia and a young male with acute nonlymphocytic leukemia of FAB type M2) and a translocation t(6;9)(p23;q34) are described. Special attention is paid to environmental factors and the early age of onset of patients within the group of leukemias with this specific translocation. In one of our cases a secondary chromosomal anomaly has arisen, which is comparable with another case from the literature.