1. 若依病變所在部位而言,下列何者是位於食道上端(upper third portion)者?
(1) Zenker’s diverticulum
(2) Plummer-Vinson syndrome(Paterson-Kelly syndrome)
(3) Mallory-Weiss syndrome
(4) Schatzki’s ring
(5) Barrett's esophagus
(A) (1)+(2)
(B) (2)+(3)
(C) (3)+(4)
(D) (4)+(5)
(E) (5)+(1)