Osm (oncostatin M), a cytokine in the interleukin 6 group originally identified to inhibit cell growth in lymphoma cells, was significantly decreased in both DA-1 and NFS-60 leukemic cells (13-fold decrease, p<0.0004 and 1.8-fold decrease, p<0.04, respectively, Datasets S2 and S3). Here, OSM is linked to lymphoma.