The mouth is a mirror of health or disease, a sentinel or early warning system. Many systemic diseases have oral manifestations.Thus oral cavity is an important diagnostic area not just because it contains derivatives of all of the primary germinal layers, and includes tissues not demonstrable anywhere else in the body, but also because of its role played in diagnosing a number of systemic diseases just because of their oral manifestations.This book presents a detailed exposition of oral and general manifestations of systemic diseases affecting humans.