{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,5]],"date-time":"2026-05-05T03:40:09Z","timestamp":1777952409097,"version":"3.51.4"},"reference-count":20,"publisher":"BMJ","issue":"5","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2026,4,11]]},"published-print":{"date-parts":[[2026,5]]},"abstract":"<jats:p>Desmoid-type fibromatosis is a rare group of locally aggressive fibroblastic proliferations of connective tissue. The incidence of synchronous intra-abdominal fibromatosis and jejunal diverticulitis is unreported. Both conditions typically present with non-specific symptoms and can be challenging to diagnose.<\/jats:p>\n                  <jats:p>\n                    We present the case of a female patient in her 70s with a diagnosis of intra-abdominal fibromatosis and perforated jejunal diverticulitis. This patient was found to have a large distal jejunal mesenteric mass and an adjoining perforated diverticulum intraoperatively. The diagnostic laparoscopy was converted to a limited laparotomy to allow for en bloc resection of the mesenteric mass. Subsequent immunohistochemistry confirmed fibromatosis with positive \u03b2-catenin and further molecular analysis confirmed a\n                    <jats:italic>CTNNB1<\/jats:italic>\n                    gene mutation. The patient remained clinically well at follow-up, with no evidence of recurrence.\n                  <\/jats:p>","DOI":"10.1136\/bcr-2025-265738","type":"journal-article","created":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T12:35:12Z","timestamp":1777898112000},"page":"e265738","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Complicated intra-abdominal fibromatosis masked by a perforated jejunal diverticulitis"],"prefix":"10.1136","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1782-3313","authenticated-orcid":false,"given":"Sadik","family":"Al-Hassani","sequence":"first","affiliation":[{"name":"Department of General Surgery, The Dudley Group NHS Foundation Trust, Dudley, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Osama","family":"Zaman","sequence":"additional","affiliation":[{"name":"Department of General Surgery, The Dudley Group NHS Foundation Trust, Dudley, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Adrian","family":"Hall","sequence":"additional","affiliation":[{"name":"Department of Radiology, The Dudley Group NHS Foundation Trust, Dudley, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shikha","family":"Singhal","sequence":"additional","affiliation":[{"name":"Royal Wolverhampton Hospitals NHS Trust, Wolverhampton, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0325-8440","authenticated-orcid":false,"given":"Akinfemi Ayobami","family":"Akingboye","sequence":"additional","affiliation":[{"name":"Department of General Surgery, The Dudley Group NHS Foundation Trust, Dudley, UK"},{"name":"College of Health and Life Science, Aston Medical School, Birmingham, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2026,5,4]]},"reference":[{"key":"2026050405350865000_19.5.e265738.1","doi-asserted-by":"crossref","first-page":"2","DOI":"10.3389\/fmed.2020.00002","article-title":"Clinical Characteristics and Treatment of Intra-abdominal Aggressive Fibromatosis: A Retrospective Study of 16 Patients","volume":"7","author":"Xiao","year":"2020","journal-title":"Front Med"},{"key":"2026050405350865000_19.5.e265738.2","unstructured":"Fletcher CDM , Bridge JA , Hogendoorn PCW . Desmoid-Type Fibromatoses. In: WHO Classification of Tumours of Soft Tissue and Bone. Lyon: IARC, 2013."},{"key":"2026050405350865000_19.5.e265738.3","doi-asserted-by":"crossref","unstructured":"Hajri M , Talbi G , Ferjaoui W , et al . Huge mesenteric desmoid-type fibromatosis with unusual presentation: A case report. Annals of Medicine & Surgery 2022;78. doi:10.1016\/j.amsu.2022.103741","DOI":"10.1016\/j.amsu.2022.103741"},{"key":"2026050405350865000_19.5.e265738.4","doi-asserted-by":"crossref","unstructured":"Matli VVK , Thoguluva Chandrasekar V , Campbell JL , et al . Jejunal Diverticulitis: A Rare Diverticular Disease of the Bowel. 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An intra-abdominal desmoid tumor. 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