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Arthrocentesis of the left knee revealed haemarthrosis, and additional laboratory workup found an undetectable serum vitamin C (ascorbic acid) level consistent with scurvy. It was determined that scurvy had predisposed the patient to injury, leading to haemarthrosis. Following vitamin C supplementation, dietary and activity modifications, and acetaminophen as needed, the patient\u2019s serum vitamin C level normalised and his left knee pain and swelling improved. Scurvy is a rare cause of haemarthrosis, but it should be recognised in at-risk patients since treatment is effective.<\/jats:p>","DOI":"10.1136\/bcr-2021-244594","type":"journal-article","created":{"date-parts":[[2022,3,7]],"date-time":"2022-03-07T10:50:30Z","timestamp":1646650230000},"page":"e244594","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":3,"title":["Scurvy: a rare cause of haemarthrosis"],"prefix":"10.1136","volume":"15","author":[{"given":"Patrick","family":"Marquardt","sequence":"first","affiliation":[{"name":"Department of Internal Medicine, UT Southwestern Medical Center, Dallas, Texas, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ganesh","family":"Raman","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, UT Southwestern Medical Center, Dallas, Texas, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu-Min","family":"Shen","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, UT Southwestern Medical Center, Dallas, Texas, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5572-7595","authenticated-orcid":false,"given":"David H","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, UT Southwestern Medical Center, Dallas, Texas, USA"},{"name":"VA North Texas Health Care System, Dallas, Texas, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2022,3,7]]},"reference":[{"key":"2025082702481262000_15.3.e244594.1","unstructured":"Lombardi M , Cardenas A . 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