The flashlamp-pumped pulsed tunable dye laser has represented a signif
icant advance in the treatment of port-wine stains (PWS). However, not
all patients will respond. In this review, the clinical features infl
uencing the response of PWS to the pulsed dye laser will be discussed.
Theoretical and clinical data are presented to explain why not all:PW
S will respond to this laser, Methods to overcome the problems of non-
responding PWS are suggested, including new treatment devices and tech
niques.