Feline gastrointestinal lymphoma

Area of Science:

• Veterinary Medicine
• Oncology
• Internal Medicine

Background:

• Gastrointestinal lymphoma is a frequent cause of anorexia and weight loss in senior cats.
• Most affected cats test negative for feline leukemia virus (FeLV) and feline immunodeficiency virus (FIV).
• Low-grade gastrointestinal lymphoma might be more prevalent than previously recognized.

Purpose of the Study:

• To investigate the clinical presentation and prognostic factors of gastrointestinal lymphoma in cats.
• To evaluate the efficacy of chemotherapy in feline gastrointestinal lymphoma.
• To explore potential molecular or immunophenotypic prognostic indicators.

Main Methods:

• Retrospective case review of cats diagnosed with gastrointestinal lymphoma.
• Analysis of clinical signs, diagnostic findings, and treatment outcomes.
• Evaluation of prognostic indicators, including initial response to chemotherapy and molecular markers.

Main Results:

• Feline gastrointestinal lymphoma commonly causes anorexia and weight loss, with or without vomiting or diarrhea.
• Cats with low-grade lymphoma show a better response to chemotherapy than those with high-grade lymphoma.
• Initial response to chemotherapy is the most significant prognostic factor for long-term remission.

Conclusions:

• Gastrointestinal lymphoma is a significant concern in older cats, often presenting with non-specific signs.
• Chemotherapy, particularly in cases of low-grade lymphoma, offers a favorable prognosis if an initial response is observed.
• Current molecular markers and immunophenotyping lack utility in predicting outcomes for feline gastrointestinal lymphoma.