# Successful Management of Recurrent Pyothorax in a Cat: Clinical Findings with Medical and Surgical Approaches

## TL;DR

This paper describes the successful treatment of a cat with recurring pyothorax using a combination of medical and surgical methods.

## Contribution

The study presents a rare case of recurrent pyothorax in a cat successfully managed with surgical intervention and prolonged thoracic lavage.

## Key findings

- Medical management alone failed to resolve the recurrence of pyothorax in the cat.
- Surgical intervention including thoracotomy and prolonged pleural lavage led to full recovery.
- Temporary myocardial thickening resolved after infection control.

## Abstract

Pyothorax is a serious condition in cats that involves accumulation of pus in the chest cavity, often requiring urgent treatment. Although most patients respond well to antibiotics and drainage, some can experience recurrence and become more complex. Here, we present a rare case of a cat that initially developed pyothorax and later experienced a recurrence in the form of a paraesophageal abscess. The condition did not respond to medical management alone and ultimately required surgical intervention, including thoracotomy and prolonged pleural lavage, to achieve full recovery. Interestingly, the cat showed a temporary thickening of the heart muscle, which resolved after the infection was controlled. This case highlights the importance of combining medical and surgical treatments in complicated cases of feline pyothorax and suggests that intrathoracic lavage with fibrinolytics may be safe and beneficial.

This report describes a case of successful management of recurrent pyothorax in a 10-year-old neutered male American Curl cat, emphasizing the clinical findings, diagnostic evaluations, and medical and surgical treatment approaches. Initially, the cat presented with severe dyspnea, anorexia, lethargy, and weight loss, with laboratory findings indicative of severe inflammation and cardiac compromise. Thoracic radiography and thoracocentesis confirmed septic pleural effusion caused by Fusobacterium russii, which was managed effectively using broad-spectrum antibiotics and thoracostomy tubes. Additionally, transient myocardial thickening (TMT) was diagnosed, which completely resolved after treatment. However, recurrence occurred as caudal mediastinal paresophageal empyema (CMPE), which was unresponsive to antibiotic therapy alone. Surgical interventions, including thoracotomy, debridement, and prolonged thoracic lavage with fibrinolytic agents, resulted in complete resolution. This case highlights the importance of considering surgical approaches and long-term thoracic lavage for the management of complicated or recurrent pyothorax in cats.