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There was no evidence of haemangioma underlying the polyp. Our literature search has identified this case as the first described haemorrhagic polyp of the nasal septum. It is likely that rivaroxaban contributed to the formation of this haemorrhagic polyp, and it is important to differentiate benign haemorrhagic lesions from malignant conditions such as melanoma. Similar cases may become more common in the future as the proportion of the population on anticoagulants increases.<\/jats:p>","DOI":"10.1136\/bcr-2020-236309","type":"journal-article","created":{"date-parts":[[2020,11,4]],"date-time":"2020-11-04T03:15:58Z","timestamp":1604459758000},"page":"e236309","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":1,"title":["Haemorrhagic nasal polyp mimicking melanoma in an 83-year-old on rivaroxaban"],"prefix":"10.1136","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1112-3968","authenticated-orcid":false,"given":"Alison","family":"Liu","sequence":"first","affiliation":[{"name":"ENT, Surrey and Sussex Healthcare NHS Trust, Redhill, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sean","family":"Fang","sequence":"additional","affiliation":[{"name":"ENT, Surrey and Sussex Healthcare NHS Trust, Redhill, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Karan","family":"Kapoor","sequence":"additional","affiliation":[{"name":"ENT, Surrey and Sussex Healthcare NHS Trust, Redhill, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Humera","family":"Babar-Craig","sequence":"additional","affiliation":[{"name":"ENT, Surrey and Sussex Healthcare NHS Trust, Redhill, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2020,11,3]]},"reference":[{"key":"2025082801195884000_13.11.e236309.1","doi-asserted-by":"publisher","DOI":"10.1258\/shorts.2012.012018"},{"key":"2025082801195884000_13.11.e236309.2","doi-asserted-by":"crossref","first-page":"719","DOI":"10.1016\/j.anl.2017.01.012","article-title":"Features of sinonasal hemangioma: a retrospective study of 31 cases","volume":"44","author":"Takaishi","year":"2017","journal-title":"Auris Nasus Larynx"},{"key":"2025082801195884000_13.11.e236309.3","doi-asserted-by":"crossref","first-page":"1775","DOI":"10.1016\/j.joms.2016.12.044","article-title":"Sinonasal hemangioma: diagnosis, treatment, and follow-up of 37 patients at a single center","volume":"75","author":"Kim","year":"2017","journal-title":"J Oral Maxillofac Surg"},{"key":"2025082801195884000_13.11.e236309.4","doi-asserted-by":"publisher","DOI":"10.1002\/path.1711150109"},{"key":"2025082801195884000_13.11.e236309.5","doi-asserted-by":"crossref","first-page":"696","DOI":"10.1017\/S0022215117001256","article-title":"Sinonasal organised haematoma: clinical features and successful application of modified transnasal endoscopic medial maxillectomy","volume":"131","author":"Suzuki","year":"2017","journal-title":"J Laryngol Otol"},{"key":"2025082801195884000_13.11.e236309.6","doi-asserted-by":"crossref","first-page":"698","DOI":"10.1016\/j.bjorl.2018.05.013","article-title":"Sinonasal organising haematoma - a little known entity","volume":"85","author":"Varghese","year":"2019","journal-title":"Braz J Otorhinolaryngol"},{"key":"2025082801195884000_13.11.e236309.7","doi-asserted-by":"publisher","DOI":"10.1177\/0284185114542364"},{"key":"2025082801195884000_13.11.e236309.8","unstructured":"NICE CKS . 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