Deceptive liver histology delays diagnosis of cardiac ascites.

Cardiac ascites is a rare condition. Diagnosis is aided by liver histology, which characteristically shows diffuse hepatic congestion affecting the centrilobular region. In our case of refractory ascites due to constrictive pericarditis, diagnosis was delayed because centribular hepatic congestion was absent histologically. Contrary to numerous published reports, diffuse hepatic congestion is not uniformly present in cardiac ascites. Constrictive pericarditis is curable and should be considered in all cases of unexplained ascites, regardless of atypical hepatic histology.