GPT and hyperthyroidism: Laboratory examination revealed evidence of mild hyperthyroidism (free thyroxine (fT4), 2.46 ng/dL) and hepatic dysfunction (total bilirubin (T.Bil), 0.5 mg/dL; aspartate aminotransferase (AST), 582 IU/L; and alanine aminotransferase (ALT), 323 IU/L).