Predisposing factors for esophagal cancer is all except
Refer Robbins page no 758-759 External beam irradiation but not mediastainal fibrosis is a risk factor for esophagal cancer *HPV DNA is found frequently in esophagal squamous cell carcinoma in high incidence
Mediastinal fibrosis
Diveicula
Caustic alkali burn
HPV
G.I.T