Narayanaperumal Mugunthan1, Rajendran Kannan2, Christilda Felicia Jebakani3, Jayaram Anbalagan4. 1. Associate Professor, Department of Anatomy, Mahatma Gandhi Medical College and Research Institute , Puducherry, India . 2. Associate Professor, Department of Surgery, Mahatma Gandhi Medical College and Research Institute , Puducherry, India . 3. Professor & Research Supervisor, Department of Anatomy, SRM Medical College Hospital and Research Centre , Kattankulathur, Chennai, India . 4. Professor, Department of Anatomy, Mahatma Gandhi Medical College and Research Institute , Puducherry, India .
Abstract
INTRODUCTION: Variations in the Right Hepatic Artery (RHA) are exceedingly common and these variations are of great importance to surgeons and interventional radiologists. A thorough knowledge of the right hepatic arterial anatomy is mandatory while performing hepatic surgery and hepatic arteriography. AIM: To find out the variations in the origin and course of the RHA and its surgical significance. MATERIALS AND METHODS: This study was conducted in 60 embalmed adult cadavers of both sexes of age group between 50 to 80 years. Abdomen was opened by a linear midline incision extending from the xiphoid process to the pubic symphysis. The origin of RHA from the proper hepatic artery was traced. The presence of aberrant right hepatic arteries -replaced and accessory were noted. The source of origin of accessory or replaced RHA arising from the superior mesenteric artery (SMA), right renal artery and inferior mesenteric artery was traced. The course of normal and aberrant RHA from its origin to the entrance into the right lobe of the liver was followed and structures related to it were noted. RESULTS: The RHA mostly originated from the main trunk of the proper hepatic artery in 52 specimens (86.6%). Presence of aberrant RHA was found in 8 specimens (13.3%). Among 8 specimens of aberrant RHA, replaced RHA arising from SMA was found in 5 specimens (8.3%) and accessory RHA arising from SMA was observed in 3 specimens (5%). In 86.6% of specimens, the RHA coursed dorsal to the duct system to enter the Calot's triangle. In 8.3% of specimens, the RHA coursed ventral to duct system to reach the Calot's triangle. The caterpillar like loop of the RHA was found in two specimens (3%). The replaced and accessory RHA (13.3%) arising from the SMA had a course dorsal to duct system to reach the Calot's triangle. CONCLUSION: Right hepatic artery is subject to anatomical variation in its origin and course. Our study identified the variations in the origin and course of right hepatic artery. Adequate knowledge of these variations would be of incredible help to the hepatobiliary surgeon and interventional radiologist.
INTRODUCTION: Variations in the Right Hepatic Artery (RHA) are exceedingly common and these variations are of great importance to surgeons and interventional radiologists. A thorough knowledge of the right hepatic arterial anatomy is mandatory while performing hepatic surgery and hepatic arteriography. AIM: To find out the variations in the origin and course of the RHA and its surgical significance. MATERIALS AND METHODS: This study was conducted in 60 embalmed adult cadavers of both sexes of age group between 50 to 80 years. Abdomen was opened by a linear midline incision extending from the xiphoid process to the pubic symphysis. The origin of RHA from the proper hepatic artery was traced. The presence of aberrant right hepatic arteries -replaced and accessory were noted. The source of origin of accessory or replaced RHA arising from the superior mesenteric artery (SMA), right renal artery and inferior mesenteric artery was traced. The course of normal and aberrant RHA from its origin to the entrance into the right lobe of the liver was followed and structures related to it were noted. RESULTS: The RHA mostly originated from the main trunk of the proper hepatic artery in 52 specimens (86.6%). Presence of aberrant RHA was found in 8 specimens (13.3%). Among 8 specimens of aberrant RHA, replaced RHA arising from SMA was found in 5 specimens (8.3%) and accessory RHA arising from SMA was observed in 3 specimens (5%). In 86.6% of specimens, the RHA coursed dorsal to the duct system to enter the Calot's triangle. In 8.3% of specimens, the RHA coursed ventral to duct system to reach the Calot's triangle. The caterpillar like loop of the RHA was found in two specimens (3%). The replaced and accessory RHA (13.3%) arising from the SMA had a course dorsal to duct system to reach the Calot's triangle. CONCLUSION: Right hepatic artery is subject to anatomical variation in its origin and course. Our study identified the variations in the origin and course of right hepatic artery. Adequate knowledge of these variations would be of incredible help to the hepatobiliary surgeon and interventional radiologist.
Authors: Tae Won Choi; Jin Wook Chung; Hyo-Cheol Kim; Myungsu Lee; Jin Woo Choi; Hwan Jun Jae; Saebeom Hur Journal: Radiol Cardiothorac Imaging Date: 2021-08-19