Black pleural effusion caused by a pancreaticopleural fistula associated with autoimmune pancreatitis: A case report.

This is the first report of black pleural effusion due to a pancreaticopleural fistula associated with autoimmune pancreatitis. The characteristic appearance of black pleural effusion may assist diagnosis. We report this case to emphasize that autoimmune pancreatitis can be a cause of black pleural effusion.