A prospective cohort study on a community-dwelling population, aged 25–84 years old, in Western Australia revealed an absence of association between TSH levels, fT4 levels, or antibodies against thyroid peroxidase (anti-TPO Abs) and all nonskin cancer events (i.e., prostate, breast, colorectal, and lung cancers combined), or with breast, colorectal, or lung cancer [75]. Here, TPO is linked to cancer.