What is the role of MRI of the muscles in the workup of focal muscular atrophy (FMA)?

Updated: Feb 20, 2018
  • Author: Sridharan Ramaratnam, MD, MBBS; Chief Editor: Helmi L Lutsep, MD  more...
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This study can provide information on the pattern of muscle involvement by showing the cross-sectional area of axial and limb muscles. [52]

It may demonstrate signal abnormalities in affected muscles secondary to inflammation and edema or replacement by fibrotic tissue.

Some authors have advocated MRI as a guide to decide which muscle to biopsy, although this recommendation is controversial.

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