TABLE 33.2.
Differential Diseases or Conditions That Can Resemble Canine Lymphoma
| Form of Lymphoma | Other Disorders |
|---|---|
| Multicentric | Disseminated infections: bacterial, viral, rickettsial, parasitic, fungal Immune-mediated disorders: dermatopathies, vasculitis, polyarthritis, lupus erythrematosus Tumors metastatic to nodes Other hematopoietic tumors: leukemia, multiple myeloma, malignant or systemic histiocytosis |
| Mediastinal | Other tumors: thymoma, chemodectoma, ultimobranchial cyst, ectopic thyroid carcinoma, pleural carcinomatosis, pulmonary lymphomatoid granulomatosisa Infectious disease: granulomatous disease, pyothorax Miscellaneous: congestive heart failure, chylothorax, hemothorax |
| Alimentary | Other gastrointestinal tumors, foreign body, lymphangiectasia, lymphocytic-plasmacytic enteritis, systemic mycosis, gastroduodenal ulceration |
| Cutaneous | Infectious dermatitis: advanced pyoderma Immune-mediated dermatitis: pemphigus Other cutaneous neoplasms (in particular histiocytic disorders) |
| Extranodal | Variable, depending on organ/system involved |
a
The existence of this disease is controversial; in most cases the disease has been reclassified as a lymphoid neoplasm.