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Identification of Aberrant Muscle Bellies in the Carpal Tunnel using Sonography
  • Published Date:
    Oct 20 2018
  • Source:
    J Diagn Med Sonogr. 35(1):62-68
  • Language:
    English


Public Access Version Available on: January 01, 2020 information icon
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Details:
  • Pubmed ID:
    30397686
  • Pubmed Central ID:
    PMC6214479
  • Description:
    Musculoskeletal sonography is being widely used for evaluation of structures within the carpal tunnel. While some anatomical variants, such as bifurcated median nerves and persistent median arteries, have been well documented, limited literature describes the sonographic appearance of aberrant muscle bellies within the carpal tunnel. Multiple examples of the sonographic appearance of flexor digitorum superficialis and lumbrical muscle bellies extending into the carpal tunnel are provided. Techniques for static image acquisition and analysis are discussed, and the use of dynamic imaging to confirm which specific muscle belly is involved is described. Knowledge of the potential presence of muscle bellies in these images and ability to identify these structures is vital to avoid misclassification or misdiagnosis as abnormal pathology. The case examples are situated among current published evidence regarding how such anomalies may be related to the development of pathologies, such as carpal tunnel syndrome.

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