Hepatic hydrothorax is most commonly caused by which condition?

Hepatic hydrothorax is most commonly caused by which condition?

• A. Cirrhosis or liver failure
• B. Acute pancreatitis
• C. Pulmonary embolism
• D. Kidney stones

Answer: (A)

Hepatic hydrothorax happens when fluid from cirrhosis-related ascites moves into the chest through tiny diaphragmatic defects or lymphatics, most often ending up as a right‑sided pleural effusion. The underlying driver is cirrhosis with portal hypertension, which creates ascites, and the fluid can track into the pleural space. The pleural fluid in this scenario is typically a transudate with a high SAAG, reflecting the portal-hypertension source. Other conditions listed can cause pleural effusions, but they do not produce hepatic hydrothorax through this diaphragmatic‑defect/lymphatic mechanism tied to cirrhosis and ascites.

Hepatic hydrothorax happens when fluid from cirrhosis-related ascites moves into the chest through tiny diaphragmatic defects or lymphatics, most often ending up as a right‑sided pleural effusion. The underlying driver is cirrhosis with portal hypertension, which creates ascites, and the fluid can track into the pleural space. The pleural fluid in this scenario is typically a transudate with a high SAAG, reflecting the portal-hypertension source. Other conditions listed can cause pleural effusions, but they do not produce hepatic hydrothorax through this diaphragmatic‑defect/lymphatic mechanism tied to cirrhosis and ascites.