STAT3 and esophageal squamous cell carcinoma: The experiments of Zhao et al. demonstrated that fibroblasts promote the production of monocytic-myeloid-derived suppressor cells (M-MDSCs) by activating the STAT3 signal secretion of IL-6 and emphasized that fibroblasts work together with M-MDSCs to promote the production of cisplatin resistance, thus providing a potential opportunity for inhibiting STAT3 signal reversal resistance in ESCC [174].