[TA] of the four segments comprising the right (part of) liver (i.e., that lie to the right side of the plane of the middle hepatic vein), the one that also lies to the right of the plane of the right hepatic vein and inferior to the plane of the transverse portion of the right branch of the hepatic portal vein; it is supplied by the lateral anterior branch of the portal vein. SYN: segmentum hepatis anterius laterale dextrum [VI] [TA].
