Falsely elevated thyroid hormone levels associated with fibrin interference in patients receiving oral anticoagulant therapy.
Mitsuaki TokumaruKenji OhbaYumiko KashiwabaraHiroyuki TakaseChiga HayashiTakayuki IwakiYasuhide SuzukiAkio MatsushitaShigekazu SasakiTakafumi SudaMasato MaekawaPublished in: Annals of clinical biochemistry (2023)
We report two patients receiving warfarin with falsely elevated thyroid hormone levels caused by fibrin interference resembling central hyperthyroidism for the first time. Our retrospective study suggests that the medication status of oral anticoagulants should be considered when evaluating thyroid function tests.