[Hyperpigmentation in primary adrenal cortex insufficiency: Addison disease].

Diffuse hyperpigmentation of the skin may develop without preceding inflammatory skin disease or be associated with various inflammatory disorders. The differential diagnosis of the diffuse hyperpigmentation is complex and difficult. We present a 36-year-old woman with diffuse hyperpigmentation caused by adrenal insufficiency, with special reference to the diagnosis and differential diagnosis of hyperpigmentation associated with endocrine disorders. In addition, metabolic, toxic, nutritional and internal factors and the skin-associated diseases leading to hyperpigmentation are categorized. A classification of diffuse hyperpigmentation is presented.