Objective To exp lore the clinical efficacy ofmodified nasolabial rotation flap in the reconstruction of upper lateral lip subunit.Methods Ten patients suffering from large treatment-resistent portwine stains or hemangiomas of upper lipswere recruited,whose defect/upper lateral lip ration weremore than 50 percent.Modified nasolabial rotation flapswere used to reconstruct the upper lateral lip subunit.Results All flaps were survived.No flap loss was noted.All scars were hidden into the borders of the upper lateral lip subunit and were outlined by the philtrum column,nostril sill,alar base and nasolabial fold.The results were satisfactory.Conclusion Modified nasolabial rotation flaps based on upper lateral lip subunits are reliable for reconstructing large,superficial defects of the upper lateral lip aesthetically and functionally.