Moderate

Serum creatine kinase-3 (CK-3) is elevated in_______________?

Correct answer: A. Muscular dystrophy

  • A. Muscular dystrophy
  • B. Myocardial infarction
  • C. Alcoholic cirrhosis
  • D. Brain tumours

Explanation

CK-3 corresponds mainly to the CK-MM isoenzyme found in skeletal muscle, so it rises in muscular dystrophy and other skeletal-muscle injuries. Myocardial infarction mainly elevates CK-MB, while brain injury involves CK-BB.

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