Neuromuscular

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FOCAL MUSCLE INVOLVEMENT

Bulbar
Focal enlargement
Focal fibrosing myopathy
Focal myositis
Hamstring
Quadriceps
Scapular winging

MRI: Fatty atrophy of Quadriceps


Quadriceps



Quadriceps atrophy
Inclusion body myositis

Quadriceps: Selective Weakness


Quadriceps: Atrophy with normal strength


Quadriceps: Strength selectively spared




Hamstring weakness



Scapular winging


Scapular winging

Finger Extension Weakness


Triceps (or Elbow Extension) Weakness


Adductors: Leg & Arm


FOCAL MYOSITIS 2

Focal myositis MRI
MRI: T2 weighted image (from M. Al-Lozi)
Focal myositis
Brachialis (Arrow)


RECURRENT FEVER WITH LOCALIZED MYOSITIS or FASCIITIS

  Tumor necrosis factor receptor superfamily, member 1A (TNFRSF1A) ; Chromosome 12p13.2; Dominant
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References

1. Muscle & Nerve 1999;22:769-771
2. Muscle & Nerve 2000;23:1569-1575, J Neurol Sci 2004;227:2125, Neuromuscular Disorders 2016; Online August
3. Arth Rheum 2002;46:2189-2194
4. Rheumatology 2002;41:1318-1322

9/13/2016