Polyglandular autoimmune syndrome type III with a prevalence of cutaneous features.

Polyglandular autoimmune syndrome (PAS) is the name given to a group of autoimmune disorders of the endocrine glands. PAS type III (PAS III) comprises several autoimmune diseases (autoimmune thyroiditis, immune-mediated diabetes mellitus, pernicious anaemia, vitiligo, alopecia areata and many others) and is subdivided into four subcategories. We report the case of a 52-year-old woman with autoimmune thyroiditis, vitiligo, alopecia areata, psoriasis and lichen sclerosus, suggesting a clinical diagnosis of PAS IIIC with a singular prevalence of cutaneous features.