Which finding is most characteristic of pancreatic hydrothorax?

Which finding is most characteristic of pancreatic hydrothorax?

• A. Left-sided pleural effusion with epigastric or LUQ abdominal pain
• B. Right-sided pleural effusion
• C. Bilateral small effusions with no abdominal symptoms
• D. Unilateral basal atelectasis

Answer: (A)

Pancreatic hydrothorax happens when pancreatic fluid leaks into the pleural space, usually through a fistula or along diaphragmatic or lymphatic pathways from the retroperitoneal pancreas. The hallmark is a large pleural effusion on the left side, often accompanied by pain in the epigastric or left upper quadrant region. This left-sided predilection reflects the pancreas’s anatomic relationship to the left hemidiaphragm and the routes pancreatic secretions take to reach the thorax. The pleural fluid often has very high amylase, which helps confirm the diagnosis. Thus a left-sided pleural effusion with LUQ/epigastric pain is the most characteristic finding. Right-sided effusions, bilateral small effusions without abdominal symptoms, or unilateral basal atelectasis are less typical given the usual pathophysiology.

Pancreatic hydrothorax happens when pancreatic fluid leaks into the pleural space, usually through a fistula or along diaphragmatic or lymphatic pathways from the retroperitoneal pancreas. The hallmark is a large pleural effusion on the left side, often accompanied by pain in the epigastric or left upper quadrant region. This left-sided predilection reflects the pancreas’s anatomic relationship to the left hemidiaphragm and the routes pancreatic secretions take to reach the thorax. The pleural fluid often has very high amylase, which helps confirm the diagnosis. Thus a left-sided pleural effusion with LUQ/epigastric pain is the most characteristic finding. Right-sided effusions, bilateral small effusions without abdominal symptoms, or unilateral basal atelectasis are less typical given the usual pathophysiology.