This document discusses various types of pigmentation disturbances. It describes endogenous pigments such as melanin, lipofuscin, hemosiderin, and bilirubin. It also discusses exogenous pigments from substances like coal dust and tattoos. Disturbances in minerals are reviewed, including dystrophic and metastatic calcification, as well as the deposition of uric acid crystals that causes gout. The document is a lecture on pigmentation disturbances copyrighted by an Iraqi university pathology professor.