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Table 1 Biochemical test results over time.

From: Myopathy Associated with Acute Hypothyroidism following Radioiodine Therapy for Graves Disease in an Adolescent

  T4 (5–10.6 mcg/dL) EFT (1.1–2.2 ng/dL) CK (24–195 U/L) ALT (0–35 U/L) AST (0–35 U/L)
Diagnosis of GD 27.8 6.6 20 27
Myopathy onset 2.3 0.5 19,800 242 112
5 months after 131-I 10.5 2 69 14 16
  1. T4, total thyroxine levels; EFT, estimated free thyroxine; CK, Creatine kinase; ALT, alanine aminotransferase; ALT, aspartate aminotransferase. Normal ranges are shown in parenthesis.