Which of the following region is involved in Plummer-Vinson syndrome?: (A) Pyriform sinus, (B) Post cricoid region, (C) Valleculae, (D) Posterior pharyngeal wall
Answer is B. Predominantly, it affects females past 40 years. Barium swallow shows a web in the postcricoid region and the same can be seen on oesophagoscopy. It is due to subepithelial fibrosis in this region. (Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 388)