Esophageal cancer is a lethal cancer encompassing adenocarcinoma and squamous cell carcinoma sub-types. The global incidence of esophageal cancer is increasing world-wide, associated with the increased prevalence of associated risk factors. The asymptomatic nature of disease often leads to late diagnosis and five-year survival rates of less than 15%.
http://www.wjgnet.com/1007-9327/full/v22/i46/10077.htm
From blood to breath: New horizons for esophageal cancer biomarkers