IL13 and esophageal squamous cell carcinoma: In ESCC, IL-13 protein concentration increased along with advancing TNM in tumor (ρ = 0.56, p = 0.016) and tumor-adjacent tissue (ρ = 0.52, p = 0.026) and tended to positively correlate with T in tumors (ρ = 0.43, p = 0.078).