This area of decreased pigment (hypopigmentation) is referred to as an "ash leaf macule" and is seen with the inherited disorder, tuberous sclerosis. Another finding, "confetti hypopigmentation" is evident as scattered white spots around the ash leaf spot.
Review Date 8/16/2016
Updated by: Anna C. Edens Hurst, MD, MS, Assistant Professor in Medical Genetics at The University of Alabama, Birmingham, AL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.