Abstract
The Feline Chronic Enteropathy Activity Index (FCEAI) has been established as a quantitative index for disease activity in chronic enteropathies in cats. A definite diagnosis is aimed at histology with initial exclusion of extraintestinal causes by laboratory examinations, diagnostic imaging and endoscopy. The study aimed to examine diagnostic parameters and FCEAI in chronic gastroenteropathies. A retrospective case review of 147 cats with chronic enteropathies was performed. In all patients, the FCEAI was established and endoscopy performed including biopsies and duodenal cytology. Histopathologic reports were reviewed for the diagnosis of lymphoma and architectural changes (epithelial integrity, villi/gland atrophy, intestinal crypt atrophy, lymphangiectasia, epitheliotropism/infiltration of intraepithelial lymphocytes). A cytopathologic score (CS) and histopathologic score (HS) regarding lymphocytic intestinal infiltration were assigned. Statistical dependency analysis was used to determine correlations between the FCEAI, lymphoma, architectural changes, CS, HS, serum concentrations of cobalamin, folate and albumin. The 147 cats consisted of predominately European Shorthair cats (n=126), were mostly castrated (n=127) and had a mean age of 9.8 (1-17) years. For the proven lymphoma group (12.2%; n=18) and the non-lymphoma group a mean FCEAI of 7.3 (4-17) and 6.6 (2-13), respectively, was established. The FCEAI showed a low correlation with the CS (p=0.010; R=0.22) and intestinal villous atrophy (n=121; p=0.035; R=0.19). Cats with a CS of 0 had a significant lower FCEAI score (p=0.015) than cats with all other CSs. The histo- and cytopathologic scores were highly related (p<0.001; R=0.43). The gastric intraepithelial lymphocytic infiltration (n=131) was significantly correlated to serum folate (p=0.014; R=-0.56) and albumin (p=0,048; R=-0.20). The FCEAI showed only a few correlations. Not only the grade of inflammation, but also the histologic architectural changes are of importance.
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