LGMD progression is described as which?

• A. Rapid progression
• B. Non-progressive
• C. Highly variable
• D. Always rapid

Answer: (C)

LGMD progression is highly variable because this group of disorders encompasses many different genetic subtypes, each with its own pattern of muscle involvement and rate of decline. Some forms begin in childhood and progress quickly, others start later and change slowly, and some individuals may go years with only mild or stable weakness before it worsens. The specific mutation determines which proteins in the muscle are affected (such as calpain-3, dysferlin, sarcoglycans, and others), contributing to a wide range of progression speeds even among people with the same subtype. That variability is why the description “highly variable” best fits LGMD.

Rapid progression, non-progressive, or always rapid don’t capture this diversity. LGMD is typically progressive, but the pace is not fixed and can differ greatly between subtypes and individuals.