Hepatopulmonary Syndrome in a Thirteen Year Old Boy: A Case Report.

Hepatopulmonary syndrome (HPS) is a late complication associated with liver cirrhosis. Recent studies have suggested that it can also occur in non-cirrhotic portal hypertension. The criteria that need to be met for making the diagnosis of HPS include chronic liver disease, impaired gaseous exchange leading to hypoxemia and intrapulmonary vascular dilation. The pathophysiology of this disease includes mediators like nitric oxide (NO), and endothelial growth factors which play an important role in intrapulmonary dilation of vessels. This, in turn, leads to ventilation-perfusion mismatch which is the main etiology of pulmonary symptoms associated with this syndrome. The classical symptoms include dyspnea, orthodeoxia and platypnea. Contrast echocardiography has emerged to be a very sensitive test for its diagnosis. The timing of appearance of microbubbles help to differentiate between intracardiac and intrapulmonary shunting, with the latter being the hallmark of HPS. The only curative treatment available is liver transplantation. Here we present a case of a 13-year-old patient who presented in Nishtar hospital in Multan, Pakistan. He initially presented with signs of liver cirrhosis but no definite cause could be found. The patient didn't come for a follow-up after that. Now he presented with signs of HPS and acute decompensated liver disease. HPS was confirmed on contrast echocardiography. This is a rare presentation of HPS in this age group.