Use If an individual presents with proximal upper extremity weakness and., If a myopathy affects only males, what inheritance pattern should., and a manifesting carrier of muscular dystrophy to frame the working diagnosis and next step; use it to sharpen the differential and avoid a false label. Make If a myopathy affects only males, what inheritance pattern should. the checkpoint that determines whether you escalate testing, narrow the differential, or change treatment.

Proximal arm and distal leg weakness is a classic clue for facioscapulohumeral muscular dystrophy; X-linked dystrophies can still produce symptoms in female carriers; Dystrophinopathies and Emery-Dreifuss dystrophy remain key X-linked considerations; FSHD is usually diagnosed clinically and confirmed with genetic testing; Life expectancy is often preserved in FSHD, with limited cardiopulmonary involvement