Growth of liver allografts over time in pediatric transplant recipients

Area of Science:

• Hepatology
• Pediatric Transplant Surgery
• Growth and Development

Background:

• The liver's regenerative capacity is well-established.
• Long-term growth patterns of liver allografts in pediatric transplant recipients remain undercharacterized.

Purpose of the Study:

• To characterize the long-term volumetric growth of liver allografts in pediatric recipients.
• To assess if liver allografts achieve and maintain standard liver volume (SLV) relative to recipient growth.

Main Methods:

• Retrospective review of pediatric liver transplant recipients at a single institution.
• Volumetric calculations from cross-sectional imaging at 1, 5, and 10 years post-transplant.
• Comparison of measured liver volumes and calculated standard liver volume (SLV) percentages.

Main Results:

• Liver allograft volumes increased by 59% at 5 years and 170% at 10 years post-transplant.
• Standard liver volume (SLV) percentages were 123% (1 year), 97% (5 years), and 118% (10 years).
• Pediatric liver allografts demonstrated significant growth, reaching appropriate SLV for height and weight by 5 years.

Conclusions:

• Liver allografts in pediatric recipients exhibit substantial growth, correlating with overall recipient development.
• Transplanted livers in children appear to maintain appropriate standard liver volume (SLV) as the recipients grow.
• This study provides crucial insights into the long-term adaptation and growth of liver allografts in pediatric populations.