The ratio of serum free T3 (FT3) over free T4 (FT4) (FT3/FT4 ratio) may reflect the degree of extrathyroidal T4 to T3 conversion activity.
Source: wiktionary
Extrathyroidal
Synonyms for "extrathyroidal"
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.