Congenital hepatic shunts

Area of Science:

• Pediatric Radiology
• Vascular Imaging
• Hepatology

Background:

• Abnormal vascular connections in the liver can be detected using ultrasonography (US).
• These anomalies require further diagnostic evaluation to determine appropriate management.
• Common conditions include infantile hepatic hemangioma, vascular malformations, and total anomalous pulmonary venous return (TAPVR).

Purpose of the Study:

• To retrospectively review radiologic findings in children with congenital hepatic vascular shunting.
• To characterize the ultrasonographic features of various abnormal hepatic vascular connections.
• To improve diagnostic accuracy and guide treatment strategies.

Main Methods:

• Retrospective review of 42 pediatric cases with congenital hepatic vascular shunting.
• Analysis of ultrasonographic findings in infantile hepatic hemangioma, vascular malformations, and infradiaphragmatic TAPVR.
• Correlation of imaging features with specific vascular anomalies.

Main Results:

• Infantile hepatic hemangiomas and arteriovenous malformations show specific US patterns like aortic tapering and hepatic artery enlargement with low resistivity index (RI).
• Congenital arterioportal shunts present with low RI, hepatofugal flow in the portal vein, and signs of portal hypertension.
• Portosystemic shunting exhibits pulsatile flow in the portomesenteric venous system, while infradiaphragmatic TAPVR shows a distinct tortuous vessel with hepatopetal flow.

Conclusions:

• Familiarity with diverse ultrasonographic features is crucial for diagnosing congenital abnormal hepatic vascular connections.
• Accurate US interpretation facilitates appropriate management of these pediatric vascular anomalies.
• This study highlights key imaging findings to differentiate various hepatic vascular shunts.