GPT and cancer: His other laboratory results were as follows: white blood cell count, 5.0 × 103/μL; hemoglobin, 10.6 g/dL; platelet count, 13.6 × 104/μL; aspartate aminotransferase(AST)/alanine aminotransferase (ALT) levels, 24/14 IU/L; plasma sodium level, 139.0 mEq/L; plasma potassium level, 4.1 mEq/L; and cancer antigen 19-9 (CA19-9) level, 29 U/mL.