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Hyperviscosity syndrome associated with lymphocytic leukemia in three dogs
Summary
Hyperviscosity syndrome in dogs can be linked to high levels of monoclonal immunoglobulin (IgA or IgM) in the blood, often seen with lymphocytic leukemia. Treatment with chlorambucil showed positive results in some cases.
Area of Science:
- Veterinary Medicine
- Oncology
- Immunology
Background:
- Lymphocytic leukemia can manifest with hyperviscosity syndrome.
- Monoclonal immunoglobulins (IgA or IgM) are implicated in canine hyperviscosity.
Observation:
- Three dogs diagnosed with lymphocytic leukemia presented with hyperviscosity syndrome.
- Clinical signs included lethargy, weakness, coughing, congestive heart failure, splenomegaly, and funduscopic changes.
Findings:
- Elevated plasma monoclonal immunoglobulin (IgA or IgM) levels were detected in affected dogs.
- Diagnosis was confirmed by identifying mature lymphocytes in blood and bone marrow.
Implications:
- This association highlights a specific complication of canine lymphocytic leukemia.
- Successful treatment of hyperviscosity syndrome with chlorambucil was observed, with one dog achieving long-term remission.