The diagnosis of intraoral pigmented lesions has always remained a diagnostic challenge for the dental practitioner. The normal color of healthy oral mucosa is pale pink, but the color varies in different physiological and pathological conditions. Physiological pigmentation is typically brown in appearance and is frequent in Asians, Africans and Mediterranean people. The color change of the oral mucosa could be due to accumulation of one or more pigments in tissues. Pigments associated with mucosal discoloration could be classified as endogenous and exogenous. The manifestation of oral...