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→Anatomy
*'''Yearlings and adults''': squamous epithelium, particularly adjacent to ''margo plicatus'', glandular and antral involvement becoming more common (9, 23 in Sanchez), severe cases of ulceration can extend dorsally into squamous fundus (Sanchez)
*'''Yearlings and adults''': squamous epithelium, particularly adjacent to ''margo plicatus'', glandular and antral involvement becoming more common (9, 23 in Sanchez), severe cases of ulceration can extend dorsally into squamous fundus (Sanchez)
File:Margo Plicatus.jpg
[[File:Margo Plicatus.jpg]]
==Risk Factors==
==Risk Factors==