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Bone marrow necrosis in the dog.

D J Weiss, P J Armstrong, K Reimann

    Journal of the American Veterinary Medical Association
    |July 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Bone marrow necrosis in dogs presents as severe anemia, often with low white blood cell and platelet counts. Histopathology reveals marrow destruction, but the specific cause remains undetermined in these cases.

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    Area of Science:

    • Veterinary Pathology
    • Canine Hematology
    • Comparative Oncology

    Background:

    • Bone marrow necrosis (BMN) is a rare but severe condition in dogs.
    • It is characterized by the death of bone marrow tissue, leading to significant hematological abnormalities.
    • Understanding the pathological features and potential causes is crucial for diagnosis and management.

    Purpose of the Study:

    • To describe the clinicopathological and histopathological findings in four dogs with bone marrow necrosis.
    • To identify characteristic changes in Romanovsky-stained bone marrow aspirates and sections.
    • To explore potential underlying causes and associated conditions.

    Main Methods:

    • Case series involving four dogs diagnosed with bone marrow necrosis.

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  • Analysis of clinical signs, hematological parameters (anemia, leukopenia, thrombocytopenia).
  • Histopathological examination of bone marrow aspirates and core biopsies using Romanovsky staining.

    • Main Results:

    • Dogs presented with refractory anemia, variably accompanied by leukopenia and thrombocytopenia.
    • Bone marrow aspirates showed diffuse blue discoloration, elongated marrow particles, degenerating cells, debris, and vacuolated macrophages.
    • Histological sections revealed extensive replacement of normal marrow by necrotic debris and hemorrhage.

    Conclusions:

    • Bone marrow necrosis in dogs is associated with severe, refractory cytopenias.
    • Distinct morphological changes are observed in stained bone marrow aspirates and sections.
    • The etiology of BMN was not identified in these cases, highlighting the need for further research into potential triggers and associated conditions like ehrlichiosis, toxicosis, malignancy, and glomerulonephritis.