This is a comprehensive textbook on pigmentation. The editors, together with more than 100 contributors, integrated virtually all current knowledge of the pigmentary system into a volume encyclopedic in scope. This book is divided into 2 parts: physiology and pathophysiology. It is organized into 8 major sections: historical and comparative perspectives, biology and regulation, molecular biology, melanin properties and synthesis, normal and abnormal skin colors, disorders of hypopigmentation and depigmentation, disorders of hyperpigmentation, and treatment of pigmentary disorders.