Posted by Shreya from IP 18.104.22.168 on April 27, 2012 at 18:16:52:
An athletic 34-year-old African-American male has experienced several bouts of severe muscle cramps and weakness during prolonged competition at racquetball tournaments. Following these episodes, his medical evaluations have revealed creatinine phosphokinase levels of over 2000 U/L (N 17-148), erythrocyte sedimentation rates of 10 mm/hr (N 1-13), and normal urinalyses. He denies any history of rash or other joint symptomatology, and otherwise enjoys good health between these episodes.
Which one of the following would most likely confirm your diagnosis?
4)An antinuclear antibody (AN level
5)A muscle biopsy
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