PubMed:: "Esophageal Neoplasms"[Mesh] OR (("Neoplasms"[Mesh] OR carcinoma*[tiab] OR neoplas*[tiab] OR tumour*[tiab] OR adenoma*[tiab] OR adenocarcinoma*[tiab] OR tumor*[tiab] OR cancer*[tiab] OR oncolog*[tiab] OR malignan*[tiab] OR carcinogen*[tiab] OR oncogen*[tiab] OR anticarcinogen*[tiab] OR squamous*[tiab] OR scc[tiab]) AND ("Esophagus"[Mesh] OR oesophag*[tiab] OR esophag*[tiab]));; Cochrane Library:: ((carcinoma* OR neoplas* OR tumour* OR adenoma* OR adenocarcinoma* OR tumor* OR cancer* OR oncolog* OR malignan* OR carcinogen* OR oncogen* OR anticarcinogen* OR squamous* OR scc) AND (oesophag* OR esophag*)):ti,ab,kw;; Embase.com:: 'esophagus tumor'/de OR 'esophagus cancer'/de OR 'esophagus carcinoma'/exp OR (('esophagus'/exp OR oesophag*:ti,ab,kw OR esophag*:ti,ab,kw) AND ('neoplasm'/exp OR carcinoma*:ti,ab,kw OR neoplas*:ti,ab,kw OR tumour*:ti,ab,kw OR adenoma*:ti,ab,kw OR adenocarcinoma*:ti,ab,kw OR tumor*:ti,ab,kw OR cancer*:ti,ab,kw OR oncolog*:ti,ab,kw OR malignan*:ti,ab,kw OR carcinogen*:ti,ab,kw OR oncogen*:ti,ab,kw OR anticarcinogen*:ti,ab,kw OR squamous*:ti,ab,kw OR scc:ti,ab,kw))
