Neuromuscular

Reducing Body & FHL1 Myopathy

FHL1: Emery Dreifus 6


H & E stain
From: CG Bonnemann MD
Reducing bodies: Irregularly shaped, cytoplasmic inclusions
Muscle fiber sizes: Varied


H & E stain
From: C Cai
FHL1 myopathy (Heterozygous, de novo, c.369C>G (p.H123Q) mutation)
  Fiber size variation: Marked
  Sarcoplasmic inclusions (Black arrow)
  Intranuclear inclusions (Yellow arrows)


Gomori trichrome stain
From: CG Bonnemann MD
Reducing bodies:
  Darkly stained on Gomori trichrome


Gomori trichrome stain
From: C Cai
FHL1 myopathy
Aggregates: Cytoplasmic bodies & Reducing Bodies (Arrows)


Gomori trichrome stain
From: C Cai
FHL1 myopathy
Intranuclear inclusions


Menadione-NBT stain
From: CG Bonnemann MD
Reducing bodies: Stain with Menadione-NBT


Congo red stain
From: C Cai
FHL1 myopathy
Inclusions: Cytoplasmic (Black arrow) & Nuclear (Yellow arrow)


From: CG Bonnemann MD

From: CG Bonnemann MD
Reducing bodies: Ultrastructure
  Structure: Granular tubulo-filamentous material (17 nm in diameter)
  Location: At periphery of sarcoplasm & around nucleus


From: C Cai
FHL1 myopathy
Inclusions: Cytoplasmic body (Black arrow) & Granule, electon dense (Yellow arrow)

From: C Cai
FHL1 myopathy
Inclusion: Granule, electon dense, composed of 20-30 nm spherical particles


From: C Cai
FHL1 myopathy
Inclusions, Intranuclear (Yellow arrow): Electron dense, granular aggregates


From: C Cai
FHL1 myopathy
Inclusion, Intranuclear: Thin filaments & Electron dense, granular aggregates


From: C Cai
FHL1 myopathy
Inclusion, Intranuclear: Filamentous material

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4/3/2020