Treatment appeared to be well tolerated, both in individual lesion treatment44 and in full- or partial-facial resurfacing.45 The first study indicated that skin may remain clear of lesions for up to a year after laser treatment, but larger studies with longer follow up would be required for confirmation of this effect. Laser resurfacing was performed only for Fitzpatrick skin types I and II. Use of laser treatment on patients with darker skin tones may be associated with a higher risk of hypo- or hyperpigmentation. Further studies should be performed before Er:YAG laser treatment can become a routine treatment for AK.

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