All are Precancerous for carcinoma esophagus Except: (A) Achalasia, (B) Paterson-Brown-Kelly syndrome, (C) Zenker's diveiculum, (D) Ectodermal dysplasia
Answer is B. .Aetiology of CARCINOMA OESOPHAGUS includes, *Diet, deficiencies (Vit. A, C, Riboflavin) *Mycotoxin *Alcohol and tobacco Common in men (Fungal contamination of food Common in China - Henan province) *Achalasia cardia In India, common in Oesophageal webs Orissa and Karnataka *Barrett's oesophagus *Plummer -Vinson's syndrome *Corrosive strictures *Tylosis *Nitrosamines Ref: SRB&;s manual of surgery,3 rd ed, pg no 751