TPO and acquired polycythemia vera: Although it has been reported that the AITD-related autoantibodies anti-TPO and anti-thyroglobulin (anti-Tg) are more prevalent in PV patients than the general population (3, 5, 6, 9, 23), thus far, levels of anti-thyroid antibodies have not been associated with static variables such as HLA status and sex or with dynamic clinical parameters including disease activity, morphology, and anti-desmoglein reactivity.