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Histiocytic sarcoma in miniature schnauzers: 30 cases
K Purzycka1, L M Peters2, J Elliott3
1Queen Mother Hospital for Animals, Royal Veterinary College, University of London, North Mymms, UK.
Histiocytic sarcoma is a serious cancer in miniature schnauzers, often affecting the lungs. While some treatments show temporary improvement, the disease is aggressive, leading to a median survival of 117 days.
Area of Science:
- Veterinary Oncology
- Canine Cancer Research
Background:
- Histiocytic sarcoma is an aggressive cancer in dogs.
- Miniature schnauzers are predisposed to certain cancers.
Purpose of the Study:
- To summarize the clinical presentation and outcomes of histiocytic sarcoma in miniature schnauzers.
- To identify key diagnostic and prognostic factors.
Main Methods:
- Retrospective review of medical records from 2008-2019.
- Inclusion of 30 miniature schnauzers diagnosed with histiocytic sarcoma.
- Analysis of signalment, clinical signs, imaging, histopathology, treatment, and survival data.
Main Results:
- Pulmonary and/or mediastinal involvement was common (24/29 dogs with thoracic imaging).
- Median overall survival time was 117 days (range 10-790 days).
- Partial imaging responses and clinical improvement were observed in dogs treated with lomustine.
Conclusions:
- Histiocytic sarcoma is a key differential diagnosis for miniature schnauzers with pulmonary masses.
- Treatment responses can occur but are often short-lived due to disease aggressiveness.
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