STAT3 and esophageal squamous cell carcinoma: Exosomal LncRNA ZFAS1 also promotes the proliferation, migration and invasion of tumor cells from esophageal carcinoma (ESCC), and inhibits the apoptosis of ESCC cells by up-regulating STAT3 and down-regulating MiR-124, leading to the carcinogenesis of ESCC.