The hepatoduodenal ligament revisited: cross-sectional imaging spectrum of non-neoplastic conditions

Abstract

Introduction: The hepatoduodenal ligament is frequently involved by conditions affecting the portal triad and surrounding structures, including a vast array of non-neoplastic conditions. Due its unique location between the retroperitoneum and the peritoneal space, the hepatoduodenal ligament is also targeted by inflammatory conditions involving the retroperitoneum and the liver. Finally, the presence of lymphatics and of the biliary tracts makes the hepatoduodenal ligament a route of spread for a variety of infections. The purpose of this pictorial essay is twofold: to review the cross-sectional radiological anatomy and variants of the structures within the hepatoduodenal ligament, and to illustrate the non-neoplastic conditions that may arise within the hepatoduodenal ligament.

Conclusion: Familiarity with these specific entities and their cross-sectional imaging findings is fundamental for a more accurate diagnosis.

Keywords: CT; Common bile duct; Hepatic artery; Hepatoduodenal ligament; MRI; Portal vein.