NAVLE Hemic and Lymphatic

Feline Lymphoma and Leukemia – NAVLE Study Guide

Lymphoma is the most common neoplasm in cats, comprising approximately 30% of all feline tumors. It arises from malignant transformation of lymphocytes and can affect virtually any organ system.

Overview and Clinical Importance

Lymphoma is the most common neoplasm in cats, comprising approximately 30% of all feline tumors. It arises from malignant transformation of lymphocytes and can affect virtually any organ system. Feline leukemia virus (FeLV) infection remains an important associated factor, particularly for mediastinal and multicentric forms, though the prevalence of FeLV-associated lymphoma has declined significantly due to widespread testing and vaccination programs.

Understanding the classification, diagnosis, and treatment of feline lymphoma/leukemia is essential for the NAVLE, as these conditions represent high-yield topics with significant clinical implications for prognosis and therapy selection.

Anatomical Form Prevalence FeLV Association Typical Age
Alimentary 50-70% Low (usually FeLV-negative) Middle-aged to older (10-13 years)
Mediastinal 12-17% High (often FeLV-positive) Young cats (2-4 years)
Multicentric 9-15% High (FeLV/FIV associated) Variable
Extranodal 12-37% Variable by site Variable by site

Anatomical Classification of Feline Lymphoma

Feline lymphoma is classified by anatomical location, with alimentary (gastrointestinal) lymphoma being the most common form in modern practice. The traditional classification includes four main anatomical forms:

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