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The paraneoplastic ectopic secretion of \u03b2hCG has been well described in gestational trophoblastic and gonadal tumours but has very rarely been associated with other tumour types. This patient\u2019s \u03b2hCG level was reflective of osteosarcoma activity and normalised with response to chemotherapy. The prognostic implications of \u03b2hCG expression in more diverse tumours is unclear; however, where raised, it can be used to monitor disease activity.<\/jats:p>","DOI":"10.1136\/bcr-2016-218438","type":"journal-article","created":{"date-parts":[[2017,4,28]],"date-time":"2017-04-28T08:40:14Z","timestamp":1493368814000},"page":"bcr-2016-218438","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":4,"title":["\u03b2hCG-secreting osteosarcoma"],"prefix":"10.1136","volume":"2017","author":[{"given":"Emily","family":"Harrold","sequence":"first","affiliation":[{"name":"Mater Misericordiae University Hospital, Dublin, Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eileen","family":"McMahon","sequence":"additional","affiliation":[{"name":"Mater Misericordiae University Hospital, Dublin, 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