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The patient went into shock after surgery owing to sepsis caused by fecal impaction. The sepsis healed rapidly after the patient was encouraged to defecate through stool evacuation. He subsequently presented with gastrointestinal bleeding from an aneurysm, requiring interventional radiology hemostasis and blood transfusion. Bleeding continued after arterial embolization. On the 35th day after surgery, cytomegalovirus enteritis was detected during a lower gastrointestinal endoscopy, for which the patient was treated with ganciclovir. Pancytopenia and constipation resulting from preoperative treatment likely contributed to the intraoperative progression of colitis obliterans. Colonic damage and gastrointestinal hemorrhage may have led to cytomegalovirus enteritis due to immunocompromised status. The combination of preoperative chemotherapy, massive bleeding, and colitis obliterans is important in an immunocompromised state and can occur in the perioperative period of pancreatic cancer. This case demonstrates the importance of perioperative bowel control during highly invasive surgery with preoperative treatment and colonoscopy at the time of hemorrhage.<\/jats:p>","DOI":"10.1007\/s12328-025-02219-7","type":"journal-article","created":{"date-parts":[[2025,9,12]],"date-time":"2025-09-12T14:55:44Z","timestamp":1757688944000},"page":"1118-1125","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Fecal colitis obliterans and cytomegalovirus enteritis after pancreaticoduodenectomy for resectable pancreatic cancer"],"prefix":"10.1007","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3058-5674","authenticated-orcid":false,"given":"Kei","family":"Nakagawa","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kazuhiro","family":"Takami","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroto","family":"Sakurai","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuki","family":"Yoshino","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kenichiro","family":"Yambe","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Noriko","family":"Kondo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kuniharu","family":"Yamamoto","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Morihisa","family":"Hirota","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chikashi","family":"Shibata","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yu","family":"Katayose","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2025,9,12]]},"reference":[{"key":"2219_CR1","doi-asserted-by":"publisher","first-page":"267","DOI":"10.1001\/jama.297.3.267","volume":"297","author":"H Oettle","year":"2007","unstructured":"Oettle H, Post S, Neuhaus P, et al. 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The other authors have no relevant financial or non-financial interests to disclose.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"This study was performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. Approved by the Research Ethics Committee for Life Science and Medical Research, Tohoku Medical and Pharmaceutical University (No. 2025-4-021-0000).","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}},{"value":"Informed consent was obtained from the participant.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent to participate"}},{"value":"Written informed consent was obtained from the patient for the publication of this case report and the accompanying images.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}}]}}