TPO and breast cancer: The presence of positive thyroid autoantibodies was not significantly associated with the pT stage of BC (p = 0.31 for TPO-Ab and p = 1.0 for Tg-Ab), the pN stage of BC (p = 0.87 for TPO-Ab and p = 0.76 for Tg-Ab), nor the grade of BC (p = 0.803 for TPO-Ab and p = 0.348 for Tg-Ab (Table 5).