Combination of non-ablative fractional photothermolysis and 0.1% tacrolimus ointment is efficacious for treating idiopathic guttate hypomelanosis

AbstractBackground: The efficacy of fractional photothermolysis and topical use of calcineurin inhibitors as treatments of idiopathic guttate hypomelanosis (IGH) have been reported. Data on combination treatments are lacking. Objectives: To evaluate the efficacy and safety of 1550-nm ytterbium/erbium fiber laser combined with 0.1% tacrolimus ointment as a treatment of IGH.Methods: In each patient with IGH, two lesions were assigned as a treatment group, whilst two lesions on another side were chosen as control. Four treatments by fractional 1550-nm ytterbium/erbium fiber laser were delivered every four weeks combined with a twice daily topical application of 0.1% tacrolimus ointment. Lesional skin color was measured by colorimeter. Digital and dermoscopic digital photographs were taken and evaluated by three dermatologists. Results: A total of 120 lesions were treated. Combination treatment normalized the relative lightness index of IGH which reached statistical significant compared with the control at we...