Abstract The retrohepatic segment of inferior vena cava and hepatic vein openings were studied in 30 adult livers. Altogether 322 hepatic vein openings were observed .The openings were classified into large, medium and small according to the size of the opening. The position of the ostia was studied by dividing the posterior wall of retrohepatic segment of inferior vena cava into 16 areas. The large openings were right, left and middle hepatic veins. The large openings showed different pattern of combinations. The anatomical knowledge of retrohepatic segment of Inferior vena cava and hepatic vein openings are important in preoperative evaluation, in liver resections and transplantation procedures.

Keywords: Retrohepatic segment, Inferior vena cava, hepatic vein openings and preoperative evaluation.