A 60-year-old man presents with three years of history of progressive leg weakness. He finds it hard walking up stairs
A 60-year-old man presents with three years of history of progressive leg weakness. He finds it hard walking up stairs and gets occasional pains in his anterior thighs. He has also noticed his hand grip is weaker and he is unable to open jars like he used to. On examination, he has muscle wasting of the forearms and quadriceps. He has mild elevation in creatinine kinase only. He is otherwise well.
Select the SINGLE most likely diagnosis from the list below. Select ONE option only.
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