LTBP1 and esophageal squamous cell carcinoma: We further found that the expression level of LTBP1 protein was increased in ESCC with lymph node metastasis compared with ESCC without lymph node metastasis, suggesting that the expression of LTBP1 protein was positively correlated with lymph node metastasis (p < 0.05, Chi Square) (Fig. 2c, Table 1).