Papilla of Vater

The papilla of Vatter is found at the medial aspect at the midpoint of the c loop. The papilla is bordered by the plica longitudinalis from the above and by another longitudinal fold, the frenulum, from below. The plica longitudinalis corresponds to the intraduodenal portion of the common bile duct, it windens as it approaches the papilla and ends in a bulging transverse fold. The preputium, which occasionally covers the papilla itself. The shape of the papilla may be hemispheric, papillary, or flat. It not only varies from patient to patient but its appearance may change somewhat during the examination