Σφακιανάκης Αλέξανδρος
ΩτοΡινοΛαρυγγολόγος
Αναπαύσεως 5 Άγιος Νικόλαος
Κρήτη 72100
00302841026182
00306932607174
alsfakia@gmail.com

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Κυριακή 26 Σεπτεμβρίου 2021

Clinical outcomes of 34 patients with resistance to thyroid hormone beta: a twenty-year experience in Japan

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Endocr J. 2021 Sep 22. doi: 10.1507/endocrj.EJ21-0390. Online ahead of print.

ABSTRACT

Resistance to thyroid hormone beta (RTHβ) caused by germline mutations in genes encoding thyroid hormone receptor beta (TRβ) is a rare disorder. Little information is available regarding the clinical experience of this syndrome in Japan. We retrospectively reviewed the records of 34 patients with RTHβ (21 adult females and 13 adult males) with positive TRβ mutations identified at our division between 2000 and 2020. Of the 24 patients with available clinical history, 10 (41.7%) received inappropriate treatments such as antithyroid drugs, thyroidectomy, or radioactive iodine. Diagnostic delay and inappropriate management of RTHβ are still present in Japan. Every patient except one demonstrated thyroid hormone profiles indicative of syndrome of inappropriate secretion of thyrotropin (SITSH), characterized by a hormonal profile of hyperthyroxinemia with a non-suppressed TSH concentration. Since the most common forms of hyperthyroidism including Graves' disease feature elevated thyroid hormone levels with suppressed TSH concentrations, early diagnosis of SITSH is critical for preventing inappropriate management. One patient positive for anti-thyroglobulin antibody (Tg-Ab) and anti-thyroperoxidase antibody (TPO-Ab) showed remarkably elevated TSH (>200 μIU/mL) despite thyroid hormone concentrations within the reference ranges. At least one thyroid autoantibody (Tg-Ab, TPO -Ab, or thyrotropin receptor antibodies) was identified in 37.9% (11/29) of the patients tested. One patient developed overt Graves' disease nine years after ‍RTHβ diagnosis. These findings suggest that RTHβ is frequently comorbid with additional autoimmune thyroid disorders. ‍Further research is required to identify the most appropriate treatments for RTHβ patients who develop a second thyroid ‍disorder.

PMID:34556608 | DOI:10.1507/endocrj.EJ21-0390

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