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Background: An ultrasonographic pattern of thickened muscularis propria in the small intestine and lymphadenopathy have been associated with gastrointestinal lymphoma and inflammatory bowel disease (IBD) in cats.

Objectives: To investigate the association of these imaging biomarkers with IBD and lymphoma in cats.

Animals: One hundred and forty‐two cats with a histologic diagnosis of normal small intestine (SI) (n = 56), lymphoma (n = 62), or IBD (n = 24).

Methods: Retrospective case review. Pathology records from 1998–2006 were searched for cats with a diagnosis of normal, IBD, or lymphoma, an ultrasonographic examination <28 days before surgery, and without ultrasonographic evidence of a mass. Multinomial regression analysis was used to determine the association of imaging biomarkers with disease status.

Results: Cats with thickening of the muscularis propria detected by ultrasonographic …