Evaluation of serum feline trypsin-like immunoreactivity for the diagnosis of pancreatitis in cats

Nigel C. Swift Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California, Davis, CA 95616.
Department of Internal Medicine, The Animal Referral Hospital, 444 Liverpool Rd, Strathfield, Sydney, NSW 2136, Australia.

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Stanley L. Marks Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, CA 95616.

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N. James MacLachlan Department of Pathology, Microbiology, and Immunology, School of Veterinary Medicine, University of California, Davis, CA 95616.

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Carol R. Norris Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, CA 95616.

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Abstract

Objective—To evaluate serum feline trypsin-like immunoreactivity (fTLI) concentration and results of abdominal ultrasonography, CBC, and serum biochemical analyses for diagnosis of pancreatitis in cats.

Design—Prospective study.

Animals—28 cats with clinical signs compatible with pancreatitis.

Procedure—Serum fTLI concentrations were determined, and abdominal ultrasonography, CBC, and serum biochemical analyses were performed prior to histologic evaluation of pancreatic, hepatic, and intestinal specimens. On the basis of histologic results, cats were categorized as having a normal pancreas (n = 10), pancreatic fibrosis with ongoing inflammation (9), pancreatic fibrosis without inflammation (4), and acute necrotizing pancreatitis (5). Serum fTLI concentrations and results of CBC, serum biochemical analyses, and histologic evaluation of hepatic and intestinal specimens were compared among groups.

Results—Significant differences in serum fTLI concentrations or any hematologic or biochemical variable were not detected among the 4 groups of cats. Median serum fTLI concentrations were 51 µg/L (range, 18 to 200 µg/L) in cats with a normal pancreas, 32 µg/L (range, 12 to > 200 µg/L) in cats with pancreatic fibrosis and ongoing inflammation, 124 µg/L (range, 36 to > 200 µg/L) in cats with pancreatic fibrosis without ongoing inflammation, and 30 µg/L (range, 24 to 84 µg/L) in cats with acute necrotizing pancreatitis. We detected a high prevalence of concurrent hepatic and intestinal tract disease in cats with pancreatitis.

Conclusion and Clinical Relevance—In cats with clinical signs of pancreatitis, serum fTLI concentration is poorly associated with histopathologic diagnosis. (J Am Vet Med Assoc 2000;217:37–42)

Abstract

Objective—To evaluate serum feline trypsin-like immunoreactivity (fTLI) concentration and results of abdominal ultrasonography, CBC, and serum biochemical analyses for diagnosis of pancreatitis in cats.

Design—Prospective study.

Animals—28 cats with clinical signs compatible with pancreatitis.

Procedure—Serum fTLI concentrations were determined, and abdominal ultrasonography, CBC, and serum biochemical analyses were performed prior to histologic evaluation of pancreatic, hepatic, and intestinal specimens. On the basis of histologic results, cats were categorized as having a normal pancreas (n = 10), pancreatic fibrosis with ongoing inflammation (9), pancreatic fibrosis without inflammation (4), and acute necrotizing pancreatitis (5). Serum fTLI concentrations and results of CBC, serum biochemical analyses, and histologic evaluation of hepatic and intestinal specimens were compared among groups.

Results—Significant differences in serum fTLI concentrations or any hematologic or biochemical variable were not detected among the 4 groups of cats. Median serum fTLI concentrations were 51 µg/L (range, 18 to 200 µg/L) in cats with a normal pancreas, 32 µg/L (range, 12 to > 200 µg/L) in cats with pancreatic fibrosis and ongoing inflammation, 124 µg/L (range, 36 to > 200 µg/L) in cats with pancreatic fibrosis without ongoing inflammation, and 30 µg/L (range, 24 to 84 µg/L) in cats with acute necrotizing pancreatitis. We detected a high prevalence of concurrent hepatic and intestinal tract disease in cats with pancreatitis.

Conclusion and Clinical Relevance—In cats with clinical signs of pancreatitis, serum fTLI concentration is poorly associated with histopathologic diagnosis. (J Am Vet Med Assoc 2000;217:37–42)

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