The view is somewhat richer if we look at the gonadal self-antigens; testis-specific protein 10 (TSGA10) was identified by immunoscreening of testis and pituitary cDNA expression library with sera from patients with APS1, but no clinical phenotype correlated with antibody positivity (320, 321). This evidence concerns the gene TSGA10 and Autoimmune polyendocrinopathy type 1.