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or female ≥18 years of age at baseline.\n* New diagnosis of IBD during a CRC screening colonoscopy, based on the criteria from the European Crohn's and Colitis Organization (33, 34).\n* Presence of a chronic inflammatory infiltrate and histological diagnosis compatible with IBD.\n* The patient must be asymptomatic at diagnosis and without previous symptoms suggestive of IBD.\n* Time interval between the index colonoscopy and the baseline visit up to 3 months.\n\nPatients from cohort B will be included if they fulfill all the following inclusion criteria:\n\n* Male or female ≥18 years of age at baseline.\n* Recent diagnosis of IBD, with \\\u003C3 months from symptoms onset.\n* Time interval between the index colonoscopy and the baseline visit up to 3 months.\n\nPatients from cohort C will be included if they fulfill all the following inclusion criteria:\n\n* Male or female ≥18 years of age at baseline.\n* No endoscopic signs of IBD after a complete ileo-colonoscopy within the CRC screening program.\n* Time interval between the index colonoscopy and the baseline visit up to 3 months.\n\nExclusion criteria\n\nPatients from cohort A will be excluded if they fulfill any the following exclusion criteria:\n\n* Identification of any enteropathogen in the stool culture.\n* Isolated findings of acute inflammatory infiltrate without signs of chronicity.\n* Previous or current diagnosis of microscopic colitis.\n* Alteration in biomarkers in blood or stool will not constitute an exclusion criterion.\n\nPatients from cohort B will be excluded if they fulfill any the following exclusion criteria:\n\n\\- Previous use of immunomodulators or biologics for any condition.\n\nPatients from cohort C will be excluded if they fulfill any the following exclusion criteria:\n\n* Any gastrointestinal symptoms at baseline.\n* Previous use of immunomodulators or biologics for any condition.",true,"ALL","18 Years",{"count":374,"type":375},450,"ESTIMATED","OBSERVATIONAL","The purpose of this study is to evaluate disease progression, in terms of development of symptomatic disease and complications associated with IBD (e.g. fistula, abscess, stricture).",[379,380,381],"Crohn Disease","Ulcerative Colitis","IBD","2026-04-10",{"date":384,"type":385},"2026-04-15","ACTUAL",{"date":387,"type":385},"2024-06-01",{"date":389,"type":375},"2038-07-01",{"name":5,"class":6},25]