Normal Main Portal Vein Size on Ultrasound as a Function of Age
| Age | Main Portal Vein Transverse Diameter (mm) |
| <10 years | 8.5 ± 2.7 |
| 10 to 20 years | 10 ± 2 |
References:
1. Patriquin HB, Perreault G, Grignon A, et al. Normal portal venous diameter in children. Pediatric Radiol 1990; 20: 451-453.
2. Weinreb J, Kumari S, Phillips G, Pochaczevsky R. Portal vein measurements by real-time sonography. AJR 1982; 139(3):497-499.
In source: Siegel MJ. Pediatric Sonography. Raven Press: New York. 1995 . p 175.