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.
Chad Haldeman-Englert, MD, FACMG, Wake Forest School of Medicine, Department of Pediatrics, Section on Medical Genetics, Winston-Salem, NC. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc.