ABSTRACT
Type II autoimmune polyglandular syndrome typically presents in adulthood. Insulin dependent diabetes mellitus and thyroid dysfunction are the most frequent manifestations. Addison's disease is the third major endocrine component of this disorder. In this report, we described a thirty-two year-old male patient who had hypogonadism, insulin dependent diabetes mellitus, and mild Addison's disease presenting its first manifestation as an acute adrenal crisis due to diabetic ketoacidosis. The ACTH concentration will be elevated early in the course of Addisons disease even before a significant reduction in the basal cortisol level or its response to exogenous ACTH occurs. Therefore, plasma ACTH measurements serve as a valuable screening study for Addisons disease.