TSLP and neoplasm: Tslp-PyMttg mice had delayed tumor onset (P < 0.0001; Fig. 1 A), developed fewer tumors (P = 0.0016; Fig. 1 B), and had less tumor burden (P < 0.0001, Fig. 1 C) associated with markedly extended survival compared with PyMttg animals (P < 0.0001, Fig. 1 D).