SAT-LB87 Golimumab Induced Thyroiditis

Abstract

Background:Subacute thyroiditis is caused by an inflammation and a destruction of the thyroid cells, leading to hyperthyroidism due to leakage of thyroid hormones, followed by possible hypothyroidism and/or full recovery of thyroid function. This is a case report describing a rare occurrence of drug-induced thyroiditis secondary to golimumab.Clinical Case:A 79-year-old female with HTN, hyperlipidemia, dementia and rheumatoid arthritis was brought to the ER for abnormal behavior including visual hallucinating and insomnia.Initial ER evaluation showed UTI for which antibiotic therapy was initiated. Dementia workup was performed including a negative head CT, nonreactive RPR, and borderline low vitamin B12 level. TFT obtained showed low TSH of 0.2mlU/L, elevated serum FT4 of 1.72ng/ml (n=0.58-1.64ng/ml) and elevated serum FT3 4.38pg/ml (n=2.5-3.9pg/ml), suggestive of hyperthyroidism. The patient reported no heat intolerance, hyperdefecation, or weight changes, but had intermittent palpitations. She denied any history of thyroid problem and did not take thyroid medication, amiodarone, biotin, or any new drug. She reported no fever or URI symptoms within the few weeks prior to admission. In addition to prednisone and methotrexate, she was taking golimumab 50mg every 30 days for the last 22 months for RA. The patient had a family history of hypothyroidism of two daughters and sister. She denied smoking, alcohol, or any other recreational drug use. Her home medications included prednisone 5mg daily, methotrexate, folic acid, lisinopril, simvastatin, and golimumab. On physical examination, she did not appear thyrotoxic and had no exophthalmos, thyroid tenderness, thyroid enlargement or thyroid nodules. Her HR range was 80bpm.Further analysis revealed normal TSI, TPO, and TgAb levels. The thyroglobulin level was very high at 2505ng/ml (n=1.6-59.9ng/ml). Her thyroid sonogram revealed bilateral thyroid nodules, largest at 1.9cm in the right mid pole. A 24-hr RAIU scan showed very low uptake (1.8%) consistent with thyroiditis (hyperthyroid phase).Endocrinology team did not recommend any antithyroid medications. In addition, she did not warrant NSAIDs or beta blockers as she was not symptomatic or tachycardic. In the absence of an autoimmune or an obvious viral process, her subacute thyroiditis was thought to be induced by golimumab.Conclusion:TNFɑ inhibitors used to treat chronic inflammatory diseases, have been rarely associated with subacute thyroiditis as described in case reports with adalimumab and etanercept use. We report the first subacute thyroiditis associated with golimumab use. We suggest that drug-induced subacute thyroiditis should be one of the differential diagnoses of thyroid dysfunction in patients treated with golimumab.