#july2020mccqe1
A moderately overweight 34-year-old woman presents to the emergency department with excessive sweating, flushing, tachycardia, and nervousness. Presuming that she might be suffering from thyrotoxicosis, the physician checks her blood levels of thyroid hormones, and finds that her free thyroxine and triiodothyronine levels are elevated, while her thyroid-stimulating hormone is decreased. Her radioactive iodine uptake test shows a complete absence of iodine uptake. Which of the following is the most likely diagnosis?
(A) Factitious thyrotoxicosis
(B) Graves’ disease
(C) Thyroid-stimulating hormone-secreting pituitary tumor
(D) Toxic adenoma
(E) Toxic multinodular goiter
A moderately overweight 34-year-old woman presents to the emergency department with excessive sweating, flushing, tachycardia, and nervousness. Presuming that she might be suffering from thyrotoxicosis, the physician checks her blood levels of thyroid hormones, and finds that her free thyroxine and triiodothyronine levels are elevated, while her thyroid-stimulating hormone is decreased. Her radioactive iodine uptake test shows a complete absence of iodine uptake. Which of the following is the most likely diagnosis?
(A) Factitious thyrotoxicosis
(B) Graves’ disease
(C) Thyroid-stimulating hormone-secreting pituitary tumor
(D) Toxic adenoma
(E) Toxic multinodular goiter
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