Medicine What laboratory evaluation is most likely to be abnormal in this 10-year-old patient who also had discrete facial erythema? A CD4 count B Creatine kinase C Rheumatoid factor D Thyrotropin 💡 Explanation What laboratory evaluation is most likely to be abnormal in this 10-year-old patient who also had discrete facial erythema? ✓ Correct Answer: B. Creatine kinase