Pediatric Hepatic Venous Outflow Tract Obstruction: Experience from a Transplant Center

Area of Science:

• Pediatric Gastroenterology and Hepatology
• Interventional Radiology
• Transplant Surgery

Background:

• Hepatic venous outflow tract obstruction (HVOTO) is a serious condition in children.
• It can manifest as isolated hepatic venous blocks, combined hepatic venous and inferior vena cava (IVC) blocks, or isolated IVC involvement.

Purpose of the Study:

• To review case records of children diagnosed with HVOTO over a 10-year period.
• To analyze the types of obstruction, management strategies, and outcomes.

Main Methods:

• Retrospective review of 11 pediatric case records with HVOTO.
• Analysis of clinical presentation, diagnostic findings, and treatment modalities including angioplasty and liver transplantation.

Main Results:

• Out of 11 cases, 6 had variable hepatic venous blocks, 4 had combined hepatic venous and IVC blocks, and 1 had isolated IVC involvement (associated with paroxysmal nocturnal hemoglobinuria).
• Angioplasty was successful in 2 out of 3 attempted cases.
• Liver transplantation was performed in 7 children with advanced liver disease, with 6 successful outcomes.

Conclusions:

• HVOTO in children can present with diverse patterns of venous obstruction.
• Interventional radiology (angioplasty) and liver transplantation are effective treatment options.
• The overall prognosis for pediatric HVOTO is favorable when managed comprehensively at a specialized medical center.