Magnifying videoendoscopic findings of Peyer's patches in the terminal ileum of Crohn's disease

Abstract
A total of seven patients with active Crohn’s disease and 19 age- and sex-matched healthy controls were enrolled. Chromoendoscopy was carried out with crystal violet and/or indigo carmine to identify PPs. The FAE on the domes of PPs was examined by magnifying endoscopy. The macroscopic appearance of PPs was classified into two categories, a nodular or convolute elevation pattern (E type, fig …