Intestinal lymphoma in dogs: 84 cases (1997-2012)

Area of Science:

• Veterinary Oncology
• Canine Cancer Research

Background:

• Primary intestinal lymphoma is a significant diagnosis in dogs.
• Understanding prognostic factors is crucial for managing canine patients.

Purpose of the Study:

• To detail signalment, clinicopathologic findings, and outcomes for dogs with primary intestinal lymphoma.
• To identify factors influencing survival times in these dogs.

Main Methods:

• Retrospective case series involving 84 client-owned dogs from 7 veterinary institutions.
• Data collection included signalment, clinical signs, tumor location, diagnostics, treatment, and survival data.
• Univariate analysis was used to assess prognostic factors.

Main Results:

• The overall median survival time (MST) was 62 days.
• Anorexia, septic peritonitis, and specific tumor locations were associated with shorter survival.
• Common intestinal changes included wall thickening and discrete masses.
• Cyclophosphamide-based or nitrosourea-based chemotherapy protocols showed no significant difference in MST.

Conclusions:

• Dogs with primary intestinal lymphoma have a poor prognosis, irrespective of first-line chemotherapy.
• Anorexia and septic peritonitis are critical indicators of a poor prognosis in canine intestinal lymphoma.
• Further research into improved treatment strategies for canine intestinal lymphoma is warranted.