MLH1 and carcinoma of esophagus: Deleted in lung and oesophageal cancer 1 methylation was also a prognostic factor independent of AJCC stage in the SCC subgroup of patients (HR, 1.754; 95% CI, 1.023–3.007; P=0.041) and MLH1 methylation in LCC (HR, 2.926; 95% CI, 1.358–6.308; P=0.006).