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Clinical Case 1
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1

A 13 year-old child is evaluated in the clinic for progressive proximal muscle weakness. He has been unable to climb stairs for the past week. There is no family history of muscular problems. He has a calculated BMI of 17 and is 48 inches tall. He has significant proximal muscle atrophy (worse in his trunk and lower extremities than in his arms) and has massive hypertrophy of his calves. His physical examination is otherwise normal.

Which of the following is most correct?
A)He has Becker muscular dystrophy
B)He has Duchenne muscular dystrophy
C)He has limb-girdle dystrophy
D)His CPK is normal
E)His aldolase is lower than normal







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