Adult- Onset Centronuclear Myopathy

Area of Science:

• Neurology
• Genetics
• Muscle Diseases

Background:

• Centronuclear myopathy (CNM) is a group of rare inherited muscle disorders.
• Characterized by muscle weakness and the presence of centrally located nuclei in muscle fibers.
• Typically presents in infancy or childhood, with recognized neonatal, childhood, and adult-onset forms.

Observation:

• A 50-year-old male presented with symptoms of centronuclear myopathy.
• The patient had no prior diagnosis or family history of the condition.
• Disease manifestation occurred in the fifth decade of life.

Findings:

• This case represents a late-onset manifestation of centronuclear myopathy.
• The adult-onset form of CNM can present significantly later than typically observed.
• Absence of a family history suggests potential de novo mutation or incomplete penetrance.

Implications:

• Expands the known clinical spectrum and age of onset for centronuclear myopathy.
• Highlights the importance of considering CNM in adult-onset muscle weakness, even without a family history.
• May prompt further research into genetic factors influencing late-onset presentations of rare myopathies.