{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T19:42:40Z","timestamp":1740166960385,"version":"3.37.3"},"reference-count":20,"publisher":"Korean Society of Pediatric Endocrinology","issue":"3","license":[{"start":{"date-parts":[[2023,9,19]],"date-time":"2023-09-19T00:00:00Z","timestamp":1695081600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["e-apem.org"],"crossmark-restriction":true},"short-container-title":["Ann Pediatr Endocrinol Metab"],"published-print":{"date-parts":[[2023,9,30]]},"abstract":"<jats:p>Thyroid hormone resistance (RTH) is characterized by a decreased sensitivity of target tissues to thyroid hormones due to a defect in the &lt;i&gt;THR\u03b1&lt;\/i&gt;- and &lt;i&gt;THR\u03b2&lt;\/i&gt;-encoded thyroid hormone receptors (THRs). The clinical manifestations range from no symptoms to simple goiter and hypo- or hyperthyroidism, depending on the receptor subtype distribution in the tissues. Here, we report the case of a thyroid hormone-resistant 12-month-old boy carrying a novel &lt;i&gt;THR\u03b2&lt;\/i&gt; variant who was initially diagnosed with congenital hypothyroidism. An extensive evaluation revealed increased free T4 level and inappropriately increased thyroid-stimulating hormone (TSH) level; a normal lipid profile, sex hormone-binding globulin, and free alpha subunit of TSH; exaggerated TSH response to THR; and no radiological evidence of pituitary adenoma. A targeted next-generation sequencing panel identified a heterozygote c.993T&gt;G (p.Asn331Lys) mutation in the &lt;i&gt;THR\u03b2&lt;\/i&gt; gene. During the first year of life, a higher dose of levothyroxine was administered to the patient due to uncompensated RTH. Levothyroxine treatment was continued after 3 years to maintain TSH level &lt;5 mIU\/mL, but the observed weight gain was poor, height increase was insufficient, and bone development was delayed. However, neither hyperactivity nor developmental delay was observed. Patients with RTH exhibit various clinical features. Due to its heterogeneous nature, genetic test for accurate diagnosis is important to provide proper management.<\/jats:p>","DOI":"10.6065\/apem.2142246.123","type":"journal-article","created":{"date-parts":[[2023,9,25]],"date-time":"2023-09-25T23:44:41Z","timestamp":1695685481000},"page":"219-224","update-policy":"https:\/\/doi.org\/10.6065\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A novel variant of THR\u03b2 and its 4-year clinical course in a Korean boy with resistance to thyroid hormone"],"prefix":"10.6065","volume":"28","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5974-5109","authenticated-orcid":true,"given":"Sejin","family":"Kim","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9220-5104","authenticated-orcid":true,"given":"Soyun","family":"Park","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9786-7898","authenticated-orcid":true,"given":"Jungeun","family":"Moon","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2937-0844","authenticated-orcid":true,"given":"Heungsik","family":"Kim","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1335-9923","authenticated-orcid":true,"given":"Seokjin","family":"Kang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"4096","reference":[{"key":"ref1","first-page":"279","volume-title":"Familial syndrome combining deaf-mutism, stippled epiphyses, goiter and abnormally high PBI: possible target organ refractoriness to thyroid hormone","author":"Refetoff","year":"1967"},{"key":"ref2","doi-asserted-by":"publisher","DOI":"10.1203\/pdr.0b013e3181b1bcbd"},{"key":"ref3","doi-asserted-by":"publisher","DOI":"10.3389\/fendo.2021.656551"},{"key":"ref4","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-030-25905-1_5"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.1007\/s12020-011-9518-6"},{"key":"ref6","first-page":"148","volume-title":"Genotyping of resistance to thyroid hormone in South American population. 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