Isolated Thyroid Sarcoidosis: A Rare Clinical Entity and Literature Review

Thyroid sarcoidosis is a rare condition in which sarcoidosis, an inflammatory disease characterized by the formation of small clusters of inflammatory cells (granulomas), affects the thyroid gland.These granulomas can lead to thyroid enlargement, sometimes, but very rarely accompanied by hormonal imbalances, which may result in either hyperthyroidism or hypothyroidism.Diagnosis typically involves imaging tests such as ultrasound, thyroid tissue biopsy, and blood tests to assess thyroid function.We present the case of a young woman who came to visit with a painless, palpable neck swelling lasting for the past four months, without other associated symptoms.She had no history of different medical conditions and was not on any medication.Her left lobe of the thyroid was enormously large and tended to be retrosternal, and the patient was undergoing thyroidectomy.Histopathological examination revealed granulomatous inflammation with multinucleated giant cells and no caseating necrosis, consistent with sarcoidosis.The patient was subsequently referred to a pulmonologist for further evaluation.Identifying thyroid sarcoidosis early can help prevent the development of complications such as thyroid dysfunction (hyperthyroidism or hypothyroidism), and early intervention is often linked to a better long-term prognosis, as it may help avoid permanent damage to the thyroid or other affected organs.Early detection helps optimize management, minimize risks, and improve the quality of life for patients with thyroid sarcoidosis.