Chylopericardium is a rare clinical condition. It is largely idiopathic but could be iatrogenic from breached thoracic duct collaterals or secondary to thoracic duct flow obstruction. We describe 2 patients seen in a single cardiothoracic center within 6 weeks, and detail the clinicopathologic correlation of an unusual complication of cardiac surgery, as well as provide an algorithm for the diagnosis and management of postcardiotomy pericardial chylous effusion.
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