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This case illustrates that although calcific tendonitis of the quadriceps is a rare condition it is not benign and should be considered when investigating acute symptoms associated with the extensor mechanism of the knee.<\/jats:p>","DOI":"10.1136\/bcr-2012-007031","type":"journal-article","created":{"date-parts":[[2012,11,27]],"date-time":"2012-11-27T17:53:18Z","timestamp":1354038798000},"page":"bcr2012007031","source":"Crossref","is-referenced-by-count":8,"title":["Atraumatic quadriceps tendon tear associated with calcific tendonitis"],"prefix":"10.1136","volume":"2012","author":[{"given":"Simon G F","family":"Abram","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akash D","family":"Sharma","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chinnakonda","family":"Arvind","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2012,11,27]]},"reference":[{"key":"2025042707374527000_2012.nov22_2.bcr2012007031.1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJM199905203402011"},{"key":"2025042707374527000_2012.nov22_2.bcr2012007031.2","doi-asserted-by":"crossref","first-page":"183","DOI":"10.5435\/00124635-199707000-00001","article-title":"Calcific tendinopathy of the rotator cuff: pathogenesis, diagnosis, and management","volume":"5","author":"Uhthoff","year":"1997","journal-title":"J Am Acad Orthop Surg"},{"key":"2025042707374527000_2012.nov22_2.bcr2012007031.3","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1007\/BF00191518","article-title":"Calcific tendinitis: a review of the usual and unusual","volume":"22","author":"Holt","year":"1993","journal-title":"Skeletal Radiol"},{"key":"2025042707374527000_2012.nov22_2.bcr2012007031.4","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.2005.020917"},{"key":"2025042707374527000_2012.nov22_2.bcr2012007031.5","doi-asserted-by":"crossref","first-page":"322","DOI":"10.1097\/00007611-198003000-00014","article-title":"Acute calcific quadriceps tendinitis","volume":"73","author":"Macurak","year":"1980","journal-title":"South Med J"},{"key":"2025042707374527000_2012.nov22_2.bcr2012007031.6","doi-asserted-by":"publisher","DOI":"10.1002\/art.1780200716"},{"key":"2025042707374527000_2012.nov22_2.bcr2012007031.7","doi-asserted-by":"crossref","first-page":"192","DOI":"10.5435\/00124635-200305000-00006","article-title":"Quadriceps tendon rupture","volume":"11","author":"Ilan","year":"2003","journal-title":"J Am Acad Orthop Surg"},{"key":"2025042707374527000_2012.nov22_2.bcr2012007031.8","doi-asserted-by":"publisher","DOI":"10.1093\/rheumatology\/kei022"},{"key":"2025042707374527000_2012.nov22_2.bcr2012007031.9","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1302\/0301-620X.66B1.6693484","article-title":"Bilateral simultaneous spontaneous rupture of the quadriceps tendons. 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