Colitis, CollagenousColitis, MicroscopicColitisColitis, LymphocyticCollagen DiseasesColonColitis, UlcerativeBiopsyIntestinal MucosaColonoscopyCrohn DiseaseDiarrheaColonic DiseasesInflammatory Bowel DiseasesBudesonideSulfasalazineLoperamideBrachyspiraColestipolAntidiarrhealsLymphocytosisProtein-Losing EnteropathiesGastrointestinal AgentsRectumSigmoidoscopyAnti-Inflammatory AgentsMesalamineColitis, IschemicCeliac DiseaseBiopsy, NeedleCholestyramine ResinFrozen SectionsColonic NeoplasmsCollagenDextran SulfateTrinitrobenzenesulfonic AcidImmunohistochemistryJejunum