Spontaneous bacterial empyema: an elusive diagnosis in a patient with cirrhosis

Hepatic hydrothorax refers to the presence of a pleural effusion (usually >500 mL) in a patient with cirrhosis in whom other causes of pleural effusion, such as cardiopulmonary causes, pleural disease or malignancy have been excluded. It is seen in 5%–10% of patients with end-stage liver disease. A subset of these patients can develop infection of the hepatic hydrothorax, called spontaneous bacterial empyema. They may present with fever, chills and dyspnoea. We present the case of an 83-year-old man with a history of cirrhosis who developed a large right-sided pleural effusion, confirmed to be empyema by pleural fluid analysis. We aim to highlight the occurrence of spontaneous bacterial empyema. While less common that spontaneous bacterial peritonitis as a complication of cirrhosis, it is equally serious with potential for adverse outcomes.

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