ERBB2 and esophageal squamous cell carcinoma: Although the number of patients included in the study was quite small, the authors showed that high levels of MIB1 (mindbomb E3 ubiquitin protein ligase 1) and low levels of nuclear factor of kappa light polypeptide gene enhancer in B-cells [NF-κB (nuclear factor κB)], HER2 (human epidermal growth factor receptor 2) and ER (oestrogen receptor) are good prognostic factors following definitive CCRT for ESCC.