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Histological examination showed moderately differentiated adenocarcinoma extending to the caecal wall and the bladder mucosa, the origin of the mass was consistent with that of a urachal cyst. The epicentre of the tumour was located in the bladder wall, with a distinct margin as a pathological feature. The patient was diagnosed with urachal cancer and concurrent direct caecal invasion.<\/jats:p>","DOI":"10.1136\/bcr-2013-200772","type":"journal-article","created":{"date-parts":[[2014,6,5]],"date-time":"2014-06-05T11:19:55Z","timestamp":1401967195000},"page":"bcr2013200772","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":2,"title":["Urachal cancer with direct caecal invasion: differential diagnosis from primary colon cancer"],"prefix":"10.1136","volume":"2014","author":[{"given":"Ji Young","family":"Park","sequence":"first","affiliation":[{"name":"Division of Gastroenterology, Department of Internal Medicine, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tae Joo","family":"Jeon","sequence":"additional","affiliation":[{"name":"Division of Gastroenterology, Department of Internal Medicine, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mi Jin","family":"Ryu","sequence":"additional","affiliation":[{"name":"Division of Gastroenterology, Department of Internal Medicine, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Won Chang","family":"Shin","sequence":"additional","affiliation":[{"name":"Division of Gastroenterology, Department of Internal Medicine, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2014,6,5]]},"reference":[{"key":"2025082801581069000_2014.jun05_1.bcr2013200772.1","doi-asserted-by":"publisher","DOI":"10.1186\/1477-7819-7-82"},{"key":"2025082801581069000_2014.jun05_1.bcr2013200772.2","doi-asserted-by":"crossref","first-page":"E27","DOI":"10.5489\/cuaj.336","article-title":"A case of metastatic urachal adenocarcinoma treated with several different chemotherapeutic regimens","volume":"6","author":"Elser","year":"2012","journal-title":"Can Urol Assoc J"},{"key":"2025082801581069000_2014.jun05_1.bcr2013200772.3","doi-asserted-by":"publisher","DOI":"10.1097\/01.coc.0000230170.25322.cd"},{"key":"2025082801581069000_2014.jun05_1.bcr2013200772.4","doi-asserted-by":"publisher","DOI":"10.1097\/PAS.0b013e31819aa4ae"},{"key":"2025082801581069000_2014.jun05_1.bcr2013200772.5","doi-asserted-by":"publisher","DOI":"10.1586\/14737140.6.12.1715"},{"key":"2025082801581069000_2014.jun05_1.bcr2013200772.6","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/S0022-5347(17)50167-6","article-title":"Malignant urachal lesions","volume":"131","author":"Sheldon","year":"1984","journal-title":"J Urol"},{"key":"2025082801581069000_2014.jun05_1.bcr2013200772.7","doi-asserted-by":"publisher","DOI":"10.1002\/cncr.22060"},{"key":"2025082801581069000_2014.jun05_1.bcr2013200772.8","doi-asserted-by":"publisher","DOI":"10.1097\/01.ju.0000054646.49381.01"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2013-200772","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,28]],"date-time":"2025-08-28T08:58:18Z","timestamp":1756371498000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2013-200772"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2014,6,5]]},"references-count":8,"alternative-id":["10.1136\/bcr-2013-200772"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2013-200772","relation":{},"ISSN":["1757-790X"],"issn-type":[{"type":"electronic","value":"1757-790X"}],"subject":[],"published":{"date-parts":[[2014,6,5]]}}}