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Subacute thyroiditis in a patient with juvenile idiopathic arthritis undergoing etanercept treatment: a case report and review of the literature.
MedLine Citation:
PMID:  22669598     Owner:  NLM     Status:  Publisher    
We report on a 24-year-old woman with juvenile idiopathic arthritis (JIA) who developed subacute thyroiditis (SAT) while being treated with etanercept. She had suffered from JIA for 12 years, and her arthritis proved refractory to treatment with ibuprofen, prednisolone, and methotrexate. For the past 5 years, the patient had been treated successfully with etanercept at 25 mg/week. The patient more recently complained of high fever and lassitude, and presented with anterior neck swelling and tenderness. Palpation of the thyroid gland revealed it to be warm, erythematous, tender, and diffusely swollen. Laboratory tests revealed an increased erythrocyte sedimentation rate and C-reactive protein level. Thyroid function tests revealed decreased levels of thyrotropin-stimulating hormone, increased levels of free triiodothyronine, free thyroxine, and thyroglobulin, and an absence of thyroid autoantibodies. Sonography showed a diffusely reduced predominantly hypoechoic thyroid gland. Unenhanced computed tomography of the neck showed a homogeneously and mildly reduced thyroid gland. Serum titers of several viruses were not significant and so were considered unlikely to be the pathogens. On the basis of these presented findings, we diagnosed SAT, and etanercept therapy was withdrawn. The patient was treated with antibiotics and an increased prednisolone dose was initiated. She became symptom free and showed improved laboratory test results within 2 weeks, and was euthyroid by 3 months. Three months later, the patient developed hypothyroidism, although 6 months further on, the patient was asymptomatic on prednisolone, methotrexate, and levothyroxine therapy. In conclusion, whether SAT is a specific adverse event in this case in response to etanercept remains unclear. Nevertheless, the possibility of SAT should be considered in such patients on etanercept treatment.
Inamo Yasuji
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-6
Journal Detail:
Title:  Modern rheumatology / the Japan Rheumatism Association     Volume:  -     ISSN:  1439-7609     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100959226     Medline TA:  Mod Rheumatol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of General Pediatrics, Nihon University Nerima-Hikarigaoka Hospital, Nihon University of School Medicine, 2-11-1, Hikarigaoka, Nerima-ku, Tokyo, Japan, 179-0072,
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