Continuous wave (CW) dye laser vs. CW argon laser treatment of port wine stain (PWS)

Pulsed dye laser treatment has shown specific vessel damage and thrombosis and good clinical bleaching of PWS at lower energy densities than continuous wave (CW) argon laser treatment. Based on a pilot study with CW dye laser treatment of PWS, we wanted to investigate whether CW dye laser would be more beneficial in PWS treatment than argon laser treatment. The hypothesis was tested in 20 randomized PWS patients, but no difference in treatment results was detected between the two treatment modalities.