Addison's disease
Addison's disease is associated with the development of other autoimmune diseases, such as type I diabetes, thyroid disease (Hashimoto's thyroiditis), celiac disease, or vitiligo. Addison's disease may be the only manifestation of undiagnosed celiac disease. Both diseases share the same genetic risk factors (HLA-DQ2 and HLA-DQ8 haplotypes).