title: Bilateral reversed palmaris longus muscle: a rare anatomical variation.
abstract: We report a case of bilateral reversed palmaris longus muscle (PLM). The muscle  was tendinous in its upper portion and muscular in its lower portion in both  arms. This rare variation has been mentioned only once in the literature as  a surgical finding. According to the literature, a reversed PLM may cause a compartment syndrome in the wrist area, carpal tunnel, and Guyon's syndrome.  The described variation is also useful to the hand surgeon as a tendon graft,  a tendon for transfer, or as an anatomical landmark for operations at this area.
authors.affiliation: Department of Normal Anatomy, Pontificia Universidad Católica de Chile, Faculty of Medicine, Santiago, Chile.
authors.forename: G
authors.initials: G
authors.lastname: Salgado
authors.forename: M
authors.initials: M
authors.lastname: Cantín
authors.forename: O
authors.initials: O
authors.lastname: Inzunza
authors.forename: A
authors.initials: A
authors.lastname: Muñoz
authors.forename: J
authors.initials: J
authors.lastname: Saez
authors.forename: M
authors.initials: M
authors.lastname: Macuer
mesh_terms: D000368:Aged; D002349:Carpal Tunnel Syndrome / Q000209:etiology / Q000601:surgery; D005542:Forearm / Q000002:abnormalities* / Q000601:surgery; D006801:Humans; D006811:Humerus / Q000002:abnormalities; D008297:Male; D018482:Muscle, Skeletal / Q000002:abnormalities* / Q000601:surgery; D009139:Musculoskeletal Abnormalities / Q000473:pathology*; D013709:Tendon Transfer / Q000009:adverse effects / Q000592:standards; D013710:Tendons / Q000002:abnormalities* / Q000601:surgery; D014953:Wrist / Q000002:abnormalities / Q000502:physiology / Q000601:surgery