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Impaired function of the FPL muscle may have several causes. A bilateral anomaly of the FPL tendon is a rare phenomenon, with only a few cases having been reported. This case report does not only demonstrate the diagnosis of bilateral FPL tendon anomaly by physical examination and magnetic resonance imaging, it also includes the embryological development of the FPL muscle and tendon.<\/jats:p>","DOI":"10.1177\/15589447221075673","type":"journal-article","created":{"date-parts":[[2022,2,21]],"date-time":"2022-02-21T02:06:27Z","timestamp":1645409187000},"page":"NP10-NP14","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Congenital Bilateral Anomaly of the Flexor Pollicis Longus Tendon Without Thenar Atrophy: A Case Report"],"prefix":"10.1177","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0578-0160","authenticated-orcid":false,"given":"Iris H. 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