Serological diagnostic factors for liver metastasis in patients with colorectal cancer

Table 1 Methods to determine biomarkers and upper or lower limits of normality used in our laboratory

Diagnostic factors	Methods	Lower and upper limits
Total bilirubin (μmol/L)	Jendrassik-Grof	2-20
Direct bilirubin (μmol/L)	Jendrassik-Grof	0-10
Alanine aminotransferase (U/L)	Rate	0-40
Aspartate aminotransferase (U/L)	Rate	0-42
Serum total protein (g/L)	Biuret	60-80
Globulin (g/L)		27-35
γ-glutamyltransferase (U/L)	Nitrophenol rate	0-50
Alkaline phosphatase (U/L)	P-nitrophenol phosphate rate	45-132
Lactate dehydrogenase (U/L)	Rate	80-240
Carcinoembryonic antigen (μg/L)	Elisa	0-5