title: Diagnostic value of serum gamma-glutamyl transferase and alkaline phosphatase activities in hepatobiliary disease in the cat.
abstract: The diagnostic value of serum gamma-glutamyl transferase (GGT) activity and serum alkaline phosphatase (ALP) activity in the detection of liver disease in the cat (n = 69) was compared. On the basis of histologic examination of the liver, cats were assigned to 8 groups: group 1--complete extrahepatic bile duct obstruction (n = 5), group 2--cholangiohepatitis-cholangitis syndrome (n = 11), group 3--hepatic lipidosis (n = 15), group 4--neoplasia, including lymphosarcoma and myeloproliferative disease (n = 9), group 5--hepatic necrosis (n = 7), group 6--cirrhosis (n = 3), group 7--portosystemic vascular anomaly (n = 4), and group 8--miscellaneous (n = 15). Cats assigned to group 8 lacked substantial histologic abnormalities of the liver. The mean value +/- SD of GGT in 20 clinically normal cats was 0.44 +/- 0.26 IU/L. The highest GGT activity in clinical patients developed in groups 1, 2, and 6. The highest ALP activity developed in groups 1 to 4. Significant correlations between GGT and ALP activities were detected only in groups 2 (P less than 0.001) and 5 (P less than 0.10). Among 54 cats with hepatic disease, only 11% had both the GGT and ALP activities within the normal ranges. Comparatively, 52% had ALP activities within the normal range, and 17% had GGT activities within the normal range.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.forename: S A
authors.initials: SA
authors.lastname: Center
authors.forename: B H
authors.initials: BH
authors.lastname: Baldwin
authors.forename: S
authors.initials: S
authors.lastname: Dillingham
authors.forename: H N
authors.initials: HN
authors.lastname: Erb
authors.forename: B C
authors.initials: BC
authors.lastname: Tennant
mesh_terms: D000469:Alkaline Phosphatase / Q000097:blood*; D000818:Animals; D002371:Cat Diseases / Q000175:diagnosis* / Q000201:enzymology; D002415:Cats; D008107:Liver Diseases / Q000175:diagnosis / Q000201:enzymology / Q000662:veterinary*; D008111:Liver Function Tests / Q000662:veterinary; D005723:gamma-Glutamyltransferase / Q000097:blood*
chemical_list: D005723:gamma-Glutamyltransferase; D000469:Alkaline Phosphatase