ABSTRACT
A revolutionary advance in the laser treatment of pigmented lesions was made by R. Rox Anderson and John Parrish of the Wellman Center for Photomedicine at Massachusetts General Hospital with the eludication of the theory of selective photothermolysis (3), which permitted precise and selective microsurgery of pigmented lesions. The Wellman group also developed fractional photothermolysis (4), which reintroduced the ability to nonselectively improve the appearance of certain types of undesirable pigment in a safe manner.
