In contrast, 11 out of 47 Cγ1CreXcPc mice succumbed to B lineage lymphoma (Additional file 1: Figure S1B, n = 47, red line) as all 11 tumors expressed B lineage markers including B220 and CD19, while the rest of morbid mice died of thymic lymphomas or solid tumors. Here, CD19 is linked to thymus lymphoma.