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At multidisciplinary oncological, haematological, histopathological, gastroenterological, radiological and palliative care assessment, the metastatic adenocarcinoma was deemed to carry a grave prognosis. Following sensitive discussion, the patient opted for palliative care and died several weeks later. Occam's razor, the principle that \u2018complexity should not be assumed unnecessarily\u2019, is a medical school doctrine. Occasionally, however, dual diagnoses do arise. Recognition, as in this case, may prove critical in informed decision-making, both by doctors and, most importantly, by patients, about prognosis and optimal patient care, especially end-of-life care.<\/jats:p>","DOI":"10.1136\/bcr-2015-212464","type":"journal-article","created":{"date-parts":[[2016,2,15]],"date-time":"2016-02-15T02:09:17Z","timestamp":1455502157000},"page":"bcr2015212464","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":4,"title":["Synchronous colonic lymphoma and adenocarcinoma in a patient with Crohn's disease, treated with thiopurine therapy and a TNF\u03b1 inhibitor: a challenge to Occam's razor"],"prefix":"10.1136","volume":"2016","author":[{"given":"Rowan Daniel","family":"Beaumont Bell","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kieran John","family":"Moriarty","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2016,1,20]]},"reference":[{"key":"2025042702301663000_2016.jan20_1.bcr2015212464.1","doi-asserted-by":"publisher","DOI":"10.1136\/gut.2006.099978"},{"key":"2025042702301663000_2016.jan20_1.bcr2015212464.2","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa020888"},{"key":"2025042702301663000_2016.jan20_1.bcr2015212464.3","doi-asserted-by":"publisher","DOI":"10.1016\/S1542-3565(04)00238-1"},{"key":"2025042702301663000_2016.jan20_1.bcr2015212464.4","doi-asserted-by":"publisher","DOI":"10.3748\/wjg.14.378"},{"key":"2025042702301663000_2016.jan20_1.bcr2015212464.5","unstructured":"National Institute for Health and Care Excellence. 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