Aetiology of Addison's Disease Addison's disease is a relatively rare condition with an incidence in the developed world of some 0.8 cases per one hundred thousand of the population. The causes of the disease are listed in Fig. 9.1. See later: •ÊAutoimmune Polyglandular Deficiencies • Adrenomyeloneuropathy and Adrenoleucodystrophy See also: • Hypothyroidism