Familial fingerprint body myopathy

Area of Science:

• Neurology
• Histopathology
• Genetics

Background:

• Congenital benign muscle disorders can present with unique histopathological features.
• Fingerprint bodies are ultrastructural inclusions observed in muscle fibers, but their specific association with diseases is still under investigation.

Observation:

• Muscle biopsy specimens from two half brothers with a congenital benign muscle disorder revealed numerous peripheral fingerprint bodies in muscle fibers.
• Histochemical patterns differed between the affected brothers.
• The unaffected mother's biopsy showed slight muscle fiber changes but no fingerprint bodies.

Findings:

• The presence of fingerprint bodies in both affected siblings, despite differing histochemical patterns, strengthens the association with a specific myopathy.
• The mother's subtle muscle changes suggest a potential genetic link or carrier state.

Implications:

• This study supports the recognition of "fingerprint body myopathy" as a distinct clinical entity.
• Further research into the genetic basis and pathogenesis of fingerprint body myopathy is warranted.
• Understanding these ultrastructural findings can aid in diagnosing rare neuromuscular disorders.