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CASE REPORT article

Front. Gastroenterol.

Sec. Therapy in Gastroenterology

Volume 4 - 2025 | doi: 10.3389/fgstr.2025.1626455

This article is part of the Research TopicAdvances in Inflammatory Bowel Disease: Treatment, Targets and TherapyView all 6 articles

Case report: Rapid resolution of fever after initiation of third-line rescue treatment with upadacitinib for acute severe ulcerative colitis in two young men

Provisionally accepted
Dan  PinzaruDan PinzaruMartin  KreysingMartin KreysingTony  LesmeisterTony LesmeisterMiriam  SchwandnerMiriam SchwandnerPatrick  MichlPatrick MichlAnnika  GaussAnnika Gauss*
  • Heidelberg University Hospital, Heidelberg, Germany

The final, formatted version of the article will be published soon.

The case report presents a novel therapeutic option in acute severe ulcerative colitis which remains a life-threatening and challenging scenario in clinical gastroenterology. It emphasizes the potential of upadacitinib, a JAK1 selective JAK inhibitor, as a medical rescue option in this situation and will be of great interest to the readers of the Research Topic which deals with Advances in Therapy in Inflammatory Bowel Diseases. As there is a lack of therapeutic options in acute severe ulcerative colitis, upadacitinib appears to be a very valuable therapeutic option. The original aspects of our case report are 1. that both reported patients suffered from fever prior to start of upadacitinib treatment, 2. that upadacitinib was used after steroid and infliximab failure, and 3. that we provide a one-year follow-up for one of the patients.

Keywords: Acute severe ulcerative colitis (ASUC), Upadacitinib, Fever, Rescue treatment, case report

Received: 10 May 2025; Accepted: 25 Jul 2025.

Copyright: © 2025 Pinzaru, Kreysing, Lesmeister, Schwandner, Michl and Gauss. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Annika Gauss, Heidelberg University Hospital, Heidelberg, Germany

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