Rigorous stereological quantification of tumor burden in the lungs [5] showed that IL4Rα-null mice developed fewer foci (Figure 2(Bi)) (n = 13, p-value < 0.005) with decreased size (Figure 2(Bii)) compared to WT mice (n = 13, p-value < 0.05), indicative of reduced seeding and persistent growth of cancer cells, respectively. The gene discussed is IL4R; the disease is cancer.