PDIA6 and Fibroadenoma: In women with fibroadenoma, an autoantibody response occurred against VPS35 (p = 0.007 compared to control women, Fig. 5a), SERBP1 (p < 0.0001 compared to control women, Fig. 5c), KRT8 (p = 0.03 compared to control women, Fig. 5d), and PDIA6 (p = 0.003 compared to control women, Fig. 5e).