A halo nevus occurs when the body develops an immune response to
the pigment cells around a nevus. The pigment disappears and the
area becomes white. Often in the process, the nevus itself
disappears, leaving a circular white spot (macula).
Review Date: 08/12/2009
Reviewed By: Michael Lehrer, M.D., Department of Dermatology, University of
Pennsylvania Medical Center, Philadelphia, PA. Review provided by
VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA,
Medical Director, A.D.A.M., Inc.
A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)
