Rates of alopecia areata appear to be equally distributed between male and female celiac patients, roughly 40% have a coinciding alternate autoimmune disorder, 70% had gastrointestinal symptoms in addition to the alopecia, and 100% of patients had positive celiac serologies (tTG IgA or EMA IgA) with subtotal or total villous atrophy on duodenal biopsies. This evidence concerns the gene CD79A and autoimmune disease.