Weight-specific normal liver stiffness values in children.

Area of Science:

• Pediatric Gastroenterology
• Medical Imaging
• Diagnostic Ultrasound

Background:

• Two-dimensional (2-D) shear wave elastography is a noninvasive method for assessing liver stiffness.
• Limited data exists on liver stiffness in pediatric populations and its correlation with body weight.

Purpose of the Study:

• To establish weight-specific reference liver stiffness values in children without liver disease.
• To investigate the association between body weight and liver elasticity in pediatric patients.

Main Methods:

• Retrospective single-center study of 171 children undergoing clinically indicated ultrasound.
• 2-D shear wave elastography performed using Canon Medical Systems Aplio i800 and a450 devices.
• Children categorized into ten weight groups to analyze weight-related trends in liver stiffness.

Main Results:

• Liver stiffness values demonstrated a significant global trend of increase with rising body weight.
• No significant differences were observed between right and left liver lobe stiffness measurements.
• The mean normal liver stiffness value across all pediatric participants was 5.3 ± 1.1 kPa.

Conclusions:

• Pediatric liver stiffness, assessed via 2-D shear wave elastography, is positively correlated with body weight.
• These established weight-specific reference values can aid in differentiating normal from pathological liver stiffness in children.