Exploring Portal Vein Hemodynamic Velocities as a Promising, Attractive Horizon for Small-for-Size Syndrome Prediction After Living-Donor Liver Transplantation: An Egyptian Center Study.

•SFSS can increase risk of mortality after LT.•PVV has good sensitivity and specificity in SFSS prediction; PO PVV appears to be a significant hemodynamic factor that influences the functional status of the transplanted liver.•Although portal velocity may appear to be less accurate than the calculated flow, it may be a less sophisticated method for SFSS prediction with acceptable sensitivity and specificity, and it could be used as an adjunctive to other parameters such as portal pressure to increase the precision of SFSS prediction.•In the presence of high IO PVV, surgeons may adopt additional maneuvers to adjust marked portal over-perfusion by graft inflow modifications such as splenectomy.