Blood testing revealed direct hyperbilirubinemia (total bilirubin [TBil], 14.2 mg/dL; direct bilirubin [DBil], 10.0 mg/dL; bile acid, 109.1 μmol/L) and liver dysfunction (aspartate aminotransferase [AST], 273 U/L; alanine aminotransferase [ALT], 233 U/L; alkaline phosphatase [ALP], 3306 U/L; glutamyl transpeptidase [GTP], 1551 U/L), indicating obstructive jaundice. Here, GPT is linked to obstructive jaundice.