[PANCCO Clinical Practice Guideline Update for the treatment of ulcerative colitis in adults]

To update the recommendations of the Pan American Crohn's and Colitis Organisation (PANCCO) for the treatment of moderate-to-severe ulcerative colitis (UC) in adults, incorporating recent evidence on new biologics, small molecules, subcutaneous formulations and appendectomy. The PAHO rapid GRADE methods were applied. PANCCO adapted the Colombian guideline 2025 for upadacitinib, tofacitinib, ozanimod and the switch to subcutaneous formulations, and developed de novo recommendations for etrasimod, guselkumab, risankizumab, ustekinumab, mirikizumab, filgotinib and appendectomy. The search was carried out in MEDLINE, Embase, Cochrane and Epistemonikos through February 2026, with quality appraised with ROBIS, AMSTAR-2, RoB 2.0 and ICEMAN; strength of recommendations was established using GRADE. Recommendations were issued for nine clinical questions. In moderate-to-severe UC, upadacitinib, tofacitinib, filgotinib, ustekinumab, mirikizumab, risankizumab and guselkumab are recommended; ozanimod and etrasimod are conditionally suggested, considering the cardiovascular profile. In patients with response to intravenous induction, switching to subcutaneous vedolizumab or subcutaneous infliximab is suggested. In UC refractory to advanced therapies, laparoscopic appendectomy is conditionally suggested as an adjuvant strategy. This third update expands the therapeutic armamentarium for moderate-to-severe UC in Latin America. Treatment choice should be individualized according to prior therapy, comorbidities, cardiovascular and thrombotic risk, availability and patient preferences.