Clinical Approach to Immune-Mediated hematological diseases in horses
Immune mediated hemolytic anemia and thrombocytopenia frequently occur concurrently
Primary immune mediated hemolytic anemia (IMHA) and thrombocytopenia (IMTP) are rare in horses with the conditions more commonly occurring secondary to underlying disease.
Several case reports have suggested a link between neoplasia and immune-mediated destruction of platelets and red blood cells. Diagnostic investigations should therefore focus on identifying possible underlying causes such as infections and neoplasia.
Immunosuppressive therapy with corticosteroids and azathioprine is the mainstay of treatment but should be used cautiously in cases where underlying infection has not been excluded. Given the frequent association of secondary IMHA and IMTP cases with neoplasia, primary cases generally have a better prognosis.
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