MR imaging of flexor digitorum accessorius longus

The flexor digitorum accessorius longus muscle (FDAL), an anomalous muscle about the ankle, has recently been implicated in tarsal tunnel syndrome. The purpose of this study is to document the prevalence of the FDAL, its MR appearance and its relation to the neurovascular bundle in the tarsal tunnel...

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Bibliographic Details
Published in:Skeletal radiology 1999-03, Vol.28 (3), p.130-137
Main Authors: CHEUNG, Y. Y, ROSENBERG, Z. S, COLON, E, JAHSS, M
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Ankle
Ankle - abnormalities
Biological and medical sciences
Diagnosis, Differential
Female
Humans
Investigative techniques, diagnostic techniques (general aspects)
Magnetic Resonance Imaging
Male
Medical sciences
Middle Aged
Muscle, Skeletal - abnormalities
Musculoskeletal Abnormalities - complications
Musculoskeletal Abnormalities - diagnosis
Musculoskeletal Abnormalities - epidemiology
Older people
Osteoarticular system. Muscles
Prevalence
Radiodiagnosis. Nmr imagery. Nmr spectrometry
Retrospective Studies
Tarsal Tunnel Syndrome - diagnosis
Tarsal Tunnel Syndrome - etiology
Tendons - abnormalities
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Summary:The flexor digitorum accessorius longus muscle (FDAL), an anomalous muscle about the ankle, has recently been implicated in tarsal tunnel syndrome. The purpose of this study is to document the prevalence of the FDAL, its MR appearance and its relation to the neurovascular bundle in the tarsal tunnel. The prevalence of the FDAL was determined from 100 ankle MR examinations in asymptomatic individuals. The appearance of the FDAL was summarized from 20 examples of FDAL: six gathered from the asymptomatic group and 14 acquired from a group of randomly collected cases of patients with ankle complaints. The prevalence of the FDAL was 6%, calculated from the group of 100 asymptomatic individuals. Possessing a dominant fleshy component in the tarsal tunnel, the FDAL accompanies the posterior neurovascular bundle as it descends the ankle. The FDAL is encountered in 6% of asymptomatic individuals. Its prominent fleshy component in the tarsal tunnel and its close proximity to the posterior tibial neurovascular bundle readily differentiate the FDAL from other medial anomalous muscles on MR imaging.
ISSN:0364-2348
1432-2161
DOI:10.1007/s002560050489