Piebaldism is a rare autosomal dominant disorder characterized by congenital poliosis and leukoderma. A congenital white forelock and multiple symmetrical hypopigmented or depigmented macules on the extremities and trunk are the striking features of Piebaldism.
Ref: Janjua SA, Khachemoune A, Guldbakke KK. Piebaldism: a case report and a concise review of the literature. Cutis. 2007 Nov;80(5):411-4.