March 3, 2026Open Access

Portal Vein Diameter on Routine Clinical CT: Establishing Normals and Disease Associations

Puntos clave

Mean portal vein diameter was calculated at 12.4 mm, showing variability based on multiple factors such as BMI and sex.
Each 1-mm increase in portal vein diameter linked to increased odds of prevalent liver disease with an odds ratio of 1.06.
Larger diameter also predicts a higher risk of esophageal varices and ascites among those with liver disease, independent of other factors.
The findings support the need for routine monitoring of portal vein diameter during clinical assessments, indicating possible liver complications.

Resumen

Mean portal vein diameter on routine clinical CT was 12.4 mm (95% CI, 12.37-12.45) and varied with sex, height, BMI, exam type, contrast use, and clinical setting.Each 1-mm increase in portal vein diameter was associated with higher odds of prevalent liver disease (OR 1.06) and portal hypertension (OR 1.18).Among individuals with liver disease, larger portal vein diameter predicted higher risk of incident esophageal varices and ascites, independent of demographic and imaging factors.

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