A patient has a goiter associated with high plasma levels of thyroid-releasing hormone (TRH) and thyroid-stimulating hormone (TSH). The heart rate is elevated. This patient most likely has which of the following? A. Endemic goiter B. A hypothalamic tumor secreting large amounts of TRH C. A pituitary tumor secreting large amounts of TSH D. Graves' disease
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Step 1: In this scenario, the patient has a goiter associated with high plasma levels of thyroid-releasing hormone (TRH) and thyroid-stimulating hormone (TSH), along with an elevated heart rate. Show more…
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A patient has a very high TSH level. Which of the following would NOT cause a high TSH level? A. Autoimmune destruction of thyroid cells that produce $\mathrm{T}_{3}$ and $\mathrm{T}_{4}$ B. A tumor in the hypothalamus that secretes high levels of TRH. C. High levels of $T_{4}$ from thyroid replacement medications. D. Cancerous growth of parafollicular cells in the thyroid, destroying other cell types in the organ.
Hypothyroidism is caused by (a) Cancer of thyroid gland (b) Development of nodule of thyroid gland (c) Iodine deficiency (d) Both (a) and (b)
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