Which histopathologic pattern is NOT among the commonly described patterns in canine inflammatory bowel disease?

Which histopathologic pattern is NOT among the commonly described patterns in canine inflammatory bowel disease?

• A. Neoplastic enteritis
• B. Lymphoplasmacytic enteritis
• C. Eosinophilic enteritis
• D. Granulomatous enteritis

Answer: (A)

Histopathology in canine inflammatory bowel disease is defined by the predominant inflammatory cell infiltrate in the intestinal mucosa, which helps distinguish the common subtypes. Lymphoplasmacytic enteritis is the classic pattern, with infiltrates of lymphocytes and plasma cells in the lamina propria. Eosinophilic enteritis features a predominance of eosinophils, and granulomatous enteritis shows macrophages forming granulomas. A pattern described as neoplastic enteritis does not fit these inflammatory categories; it implies a tumor-driven process rather than chronic inflammatory infiltration. While inflammatory bowel disease can sometimes be challenging to distinguish from intestinal lymphoma, this is resolved through careful histology and adjunct tests, not by describing neoplasia as an IBD pattern. Thus, neoplastic enteritis is not among the commonly described histopathologic patterns in canine IBD.

Histopathology in canine inflammatory bowel disease is defined by the predominant inflammatory cell infiltrate in the intestinal mucosa, which helps distinguish the common subtypes. Lymphoplasmacytic enteritis is the classic pattern, with infiltrates of lymphocytes and plasma cells in the lamina propria. Eosinophilic enteritis features a predominance of eosinophils, and granulomatous enteritis shows macrophages forming granulomas. A pattern described as neoplastic enteritis does not fit these inflammatory categories; it implies a tumor-driven process rather than chronic inflammatory infiltration. While inflammatory bowel disease can sometimes be challenging to distinguish from intestinal lymphoma, this is resolved through careful histology and adjunct tests, not by describing neoplasia as an IBD pattern. Thus, neoplastic enteritis is not among the commonly described histopathologic patterns in canine IBD.