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His postoperative course was unremarkable. Histopathological and immunohistochemical studies showed a rectal carcinosarcoma. Because of a state-mandated lockdown due to the COVID-19 pandemic, the patient failed to follow-up. He was later seen to have metastatic progression. Owing to the poor functional status of the patient, the shared decision of the multidisciplinary team, the patient and his family was to manage him with palliative intent.<\/jats:p>","DOI":"10.1136\/bcr-2021-244501","type":"journal-article","created":{"date-parts":[[2021,8,17]],"date-time":"2021-08-17T13:12:29Z","timestamp":1629205949000},"page":"e244501","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":3,"title":["Abdominotransanal resection of a strangulated rectal carcinosarcoma"],"prefix":"10.1136","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7727-7401","authenticated-orcid":false,"given":"Sofia Isabel Tamesa","family":"Manlubatan","sequence":"first","affiliation":[{"name":"Department of Surgery, University of the Philippines - Philippine General Hospital, Manila, Philippines"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0887-2498","authenticated-orcid":false,"given":"Marc Paul Jose","family":"Lopez","sequence":"additional","affiliation":[{"name":"Department of Surgery, University of the Philippines - Philippine General Hospital, Manila, Philippines"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4961-7365","authenticated-orcid":false,"given":"Sittie Aneza Camille Amad","family":"Maglangit","sequence":"additional","affiliation":[{"name":"Department of Surgery, University of the Philippines - Philippine General Hospital, Manila, Philippines"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gabriel Miguel","family":"Ozoa","sequence":"additional","affiliation":[{"name":"Department of Laboratories, University of the Philippines - Philippine General Hospital, Manila, Philippines"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2021,8,17]]},"reference":[{"key":"2025082702213513000_14.8.e244501.1","doi-asserted-by":"publisher","DOI":"10.3748\/wjg.14.4389"},{"key":"2025082702213513000_14.8.e244501.2","doi-asserted-by":"crossref","first-page":"1481","DOI":"10.3748\/wjg.v12.i9.1481","article-title":"Rectal carcinosarcoma: a case report and review of literature","volume":"12","author":"Tsekouras","year":"2006","journal-title":"World J Gastroenterol"},{"key":"2025082702213513000_14.8.e244501.3","first-page":"118","article-title":"Carcinosarcomas: current perspectives and an historical review of nosological concepts","volume":"10","author":"Wick","year":"1993","journal-title":"Semin Diagn Pathol"},{"key":"2025082702213513000_14.8.e244501.4","doi-asserted-by":"publisher","DOI":"10.1002\/1097-0142(19810815)48:4<994::AID-CNCR2820480424>3.0.CO;2-M"},{"key":"2025082702213513000_14.8.e244501.5","first-page":"236","article-title":"A rare tumor located in the anorectal junction: sarcomatoid carcinoma","volume":"17","author":"Ozt\u00fcrk","year":"2006","journal-title":"Turk J Gastroenterol"},{"key":"2025082702213513000_14.8.e244501.6","doi-asserted-by":"crossref","first-page":"545","DOI":"10.1007\/s10595-002-2526-8","article-title":"Carcinosarcoma of the rectosigmoid colon: report of a case","volume":"33","author":"Ishida","year":"2003","journal-title":"Surg Today"},{"key":"2025082702213513000_14.8.e244501.7","doi-asserted-by":"crossref","first-page":"395","DOI":"10.5009\/gnl.2012.6.3.395","article-title":"Carcinosarcoma in the cecum","volume":"6","author":"Ryu","year":"2012","journal-title":"Gut Liver"},{"key":"2025082702213513000_14.8.e244501.8","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-2559.2001.01119.x"},{"key":"2025082702213513000_14.8.e244501.9","doi-asserted-by":"crossref","first-page":"748","DOI":"10.1046\/j.1440-1746.2003.30291.x","article-title":"Colonic carcinosarcoma","volume":"18","author":"Conzo","year":"2003","journal-title":"J Gastroenterol Hepatol"},{"key":"2025082702213513000_14.8.e244501.10","first-page":"1","article-title":"Carcinosarcoma of the rectum: report of a rare colorectal malignancy and review of the literature","volume":"2015","author":"Sudlow","year":"2015","journal-title":"Case Rep Surg"},{"key":"2025082702213513000_14.8.e244501.11","unstructured":"WHO Classification of Tumours Editorial Board, World Health Organization . 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