IL4 and laryngotracheoesophageal cleft: The hallmark cytokines of Th2, interleukin (IL)−4 and IL‐13 highly expressed in AD and LC patients, were associated with tumor regression by recruiting infiltrating eosinophils and macrophages, while IL‐4 and IL‐13 neutralization led to loss of the antitumor immune response.47, 48