Muscular Dystrophy and Serum CK Activity
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Questions and Answers

What is the clinical significance of elevated serum CK activity?

  • It is a common symptom of viral myositis
  • It is only elevated in Duchenne muscular dystrophy
  • It is highest in infancy and childhood in progressive muscular dystrophy (correct)
  • It is not related to any muscle diseases

    • At what age is serum CK activity highest in progressive muscular dystrophy?

  • Early adulthood (19-30 years of age)
  • Middle age (31-50 years of age)
  • Adolescence (11-18 years of age)
  • Infancy and childhood (7-10 years of age) (correct)

    • What is the significance of high values of CK in asymptomatic female carriers of Duchenne dystrophy?

  • It is only found in female carriers of the disease
  • It is not significant and does not indicate the presence of the disease
  • It is a common symptom of the disease
  • 50%-80% of asymptomatic female carriers show threefold to six-fold increase of CK activity (correct)

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