TSH-Secreting Pituitary Adenoma
TSH-producing pituitary adenoma is a rare cause of thyrotoxicosis, and the rarest of all types of secretory pituitary adenomas. We present a case of a 55-year-old man who, after 6 years of therapy for presumed hypothyroidism, was diagnosed with a TSH-producing pituitary adenoma. He was lost to follow-up after that, to present again with thyrotoxicosis and atrial flutter 10 years later. We review the presentation, evaluation, treatment, and differential diagnosis of TSH-producing adenomas.
KeywordsThyrotoxicosis TSH-secreting adenoma Struma ovarii Exogenous thyrotoxicosis Thyroid gland TSH Free T4
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