has part has part has_part characteristic of part of has modifier abnormal vein morphology abnormal paraumbilical vein morphology any structural anomaly of one or more of small superficial veins that run from the umbilicus along the round ligament of the liver and terminate as accessory portal veins in the liver; these are susceptible to varicosity during portal hypertension abnormal venae paraumbilicales morphology MP:0013863 morphology abnormal paraumbilical vein