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CT features and short-term outcome in cats presenting with pyothorax
Ines Lopes Rei1, Emilie Paran1, Helen Wilson1
1Langford Vets, Bristol, UK.
Journal of Feline Medicine and Surgery
|September 4, 2025
Summary
This study reveals common computed tomography (CT) findings in cats with pyothorax, including pleural effusion and lymphadenomegaly. Feline pyothorax shows a good short-term outcome with medical or surgical management.
Area of Science:
- Veterinary Radiology
- Comparative Pathology
- Thoracic Imaging
Background:
- Pyothorax is a serious condition in cats.
- Accurate diagnosis and understanding of CT findings are crucial for effective management.
- Short-term outcomes and treatment modalities require further investigation.
Purpose of the Study:
- To evaluate computed tomography (CT) findings in cats diagnosed with pyothorax.
- To assess the short-term clinical outcomes of feline pyothorax cases.
- To correlate imaging features with treatment and survival rates.
Main Methods:
- Retrospective, descriptive study of 41 cats with pyothorax.
- Blind review of thoracic CT scans by veterinary radiologists.
- Recording of clinical data including treatment, hospitalization, and survival to discharge.
Main Results:
- All cats (100%) presented with pleural effusion.
- Common CT findings included lymphadenomegaly (85%), pleural thickening (85%), pannus (81%), and pneumonia (49%).
- 36 out of 41 cats survived to discharge, with a median hospitalization of 7 days.
Conclusions:
- Cats with pyothorax exhibit significant CT changes across multiple thoracic compartments.
- Both medical and surgical interventions can lead to favorable short-term outcomes in feline pyothorax.
- CT imaging is valuable for diagnosing feline pyothorax and assessing its extent.
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