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Malignant histiocytosis in a cat
E A Court1, K A Earnest-Koons, S C Barr
1Department of Clinical Sciences, New York State College of Veterinary Medicine, Cornell University, Ithaca 14853-6401.
Journal of the American Veterinary Medical Association
|November 1, 1993
Summary
A rare cancer caused malignant histiocytes to infiltrate a cat's organs, leading to severe anemia and organ failure. Despite transfusions, the cat's condition worsened, necessitating euthanasia.
Area of Science:
- Veterinary Pathology
- Hematology
- Oncology
Background:
- Histiocytic diseases are uncommon in cats.
- Malignant histiocytosis can affect multiple organs.
Observation:
- A 13-year-old domestic shorthair cat presented with severe anemia, thrombocytopenia, and other hematological abnormalities.
- Clinical signs included hyperglycemia and hyperbilirubinemia.
- Packed red blood cell transfusions provided only transient improvement.
Findings:
- Necropsy revealed infiltration of the spleen, liver, lymph nodes, and bone marrow by malignant histiocytes.
- These malignant cells were observed to be actively phagocytosing red blood cells (erythrophagocytosis).
Implications:
- This case highlights the aggressive nature of disseminated histiocytic sarcoma in cats.
- Erythrophagocytosis by malignant histiocytes can be a significant factor in the severe anemia observed.
- Early recognition and understanding of this condition are crucial for feline oncology.
