Rare Hepatopleural Fistula Linked to a Persistent Liver Abscess
A 70‑year‑old man with autosomal dominant polycystic kidney disease (ADPKD) and associated polycystic liver disease (PCLD) developed a hepatopleural fistula that culminated in right‑sided empyema. The fistula—an abnormal channel that allowed infected liver‑cyst fluid to leak into the pleural cavity—was diagnosed by contrast‑enhanced computed tomography showing a 25 × 13 cm liver cyst abutting the diaphragm and extending into the right pleural space. The patient refused surgery and was managed with thoracic tube drainage, percutaneous cyst drainage, and a six‑week course of intravenous meropenem, leading to clinical resolution and radiologic improvement.
Understanding Hepatopleural Fistula
Hepatopleural fistula is an uncommon complication of liver pathology. The American College of Gastroenterology reports that pleural effusions caused by a hepatic source represent fewer than one percent of all pleural effusions. Most documented cases arise from amebic liver abscesses or ruptured hydatid cysts; fistulas secondary to bacterial (pyogenic) liver abscesses are exceedingly rare, with only isolated case reports in the peer‑reviewed literature.
Pyogenic liver abscesses themselves affect 2.3 to 17.5 per 100,000 individuals each year, according to the National Institutes of Health. Typical causative organisms include Escherichia coli, Klebsiella pneumoniae, and mixed anaerobes. In patients with ADPKD, cystic liver disease can produce large solitary cysts that become infected, especially after percutaneous interventions, thereby increasing the risk of rupture into adjacent structures such as the diaphragm.
Clinical Presentation and Diagnosis
Patients with hepatopleural fistula often present with recurrent large pleural effusions that are exudative and may become purulent. Dyspnea, pleuritic chest pain, fever, and leukocytosis are common, but abdominal pain may be absent because the fistulous tract diverts inflammatory fluid away from the peritoneal cavity. In the reported case, the pleural fluid analysis demonstrated an exudate with a white‑cell count exceeding 300,000 cells/µL and grew extended‑spectrum beta‑lactamase–producing E. coli, confirming empyema.
Imaging is essential. Contrast‑enhanced CT provides the highest sensitivity for visualizing both the hepatic cyst and its diaphragmatic breach. Magnetic resonance cholangiopancreatography (MRCP) can delineate the fistulous tract non‑invasively, while endoscopic retrograde cholangiopancreatography (ERCP) may identify ductal leaks but carries procedural risk. According to Medscape, CT detects hepatopleural fistula in roughly 47 % of cases, whereas MRCP improves detection to about 80 %.
Treatment Strategies
Management combines control of infection, drainage of both pleural and intra‑hepatic collections, and definitive closure of the fistula. Broad‑spectrum antibiotics targeting Gram‑negative bacilli and anaerobes are initiated after blood cultures are drawn; meropenem is a common choice for ESBL‑producing organisms. Percutaneous drainage, performed under ultrasound or CT guidance, is the first‑line approach for abscesses larger than 5 cm, as endorsed by the Infectious Diseases Society of America. Surgical repair—via thoracotomy, diaphragmatic repair, or hepatic resection—remains the gold standard for non‑healing fistulas or when percutaneous measures fail.
In the presented case, the patient’s refusal of surgery did not preclude recovery. Serial imaging after two months showed a marked reduction in both the cyst size and the pleural effusion, and the drainage catheters were removed without complication. This outcome aligns with emerging data that suggest a success rate of up to 93 % for conservative treatment when the underlying ductal anatomy is favorable and there are no obstructive biliary pathologies.
Expert Perspective
Dr. Kessarin Thanapirom, a gastroenterologist at King Chulalongkorn Memorial Hospital, emphasizes that “clinicians should maintain a high index of suspicion for hepatopleural communication in patients with large hepatic cysts who develop unexplained pleural effusions, especially when standard pulmonary sources are excluded.” A review in the World Journal of Gastroenterology notes that early multidisciplinary involvement—radiology, interventional pulmonology, and hepatology—optimizes outcomes and may spare patients from extensive surgery.
Public‑Health Relevance
While hepatopleural fistula is rare, its recognition is vital for preventing severe complications such as sepsis, respiratory failure, and prolonged hospital stays. Timely imaging and appropriate drainage can reduce morbidity and health‑care costs, particularly in regions where ADPKD and cystic liver disease are prevalent. The World Health Organization identifies chronic kidney disease as a growing global health burden; patients with ADPKD represent a subset at heightened risk for hepatic complications, underscoring the need for vigilant monitoring.
What Readers Should Know
Anyone with a known liver cyst who experiences persistent chest symptoms should seek prompt medical evaluation. Early diagnostic imaging can differentiate a hepatopleural fistula from more common causes of pleural effusion, enabling targeted therapy. For health professionals, the case reinforces the value of a conservative, image‑guided approach when surgical options are declined or contraindicated.
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