The tumours in Ccr6+/+ → Ccr6+/+ (1.27 g ± 0.82 g) and Ccr6−/− → Ccr6+/+ (1.8 g ± 1.25 g) mice showed comparative weights, whereas Ccr6+/+ → Ccr6−/− (0.61 g ± 0.48 g) mice presented with tumours of significantly lower weight comparable to Ccr6-deficient C57BL/6 mice (Fig. 5d). The gene discussed is CCR6; the disease is neoplasm.