All are the predisposing factors for carcinoma esophagus except: (A) Achalasia, (B) Tylosis palmaris, (C) Zenker's diveiculum, (D) Ectodermal dysplasia
Answer is D. Risk factors for SCC:SmokingAlcoholIngested carcinogens Chronic AchalasiaLye (caustic) ingestionLong-term ingestion of hot liquidsPlummer Vinson syndromeTylosis palmaris et plantarisHuman papilloma virusEsophageal diveiculaDeficiency: Vitamin A, zinc, molybdenumRef: Harrison; 19th edition