Question

question 6 (mandatory) (1 point)
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a 34 - year - old female patient presents with fatigue and weight gain. her lab work reveals increased trh, and increased tsh. which of the following is the most likely diagnosis?
a) hashimotos
b) graves disease
c) pituitary adenoma
d) tertiary hypothyroidism

Explanation:

• Hashimoto's: It is an autoimmune thyroiditis. In primary hypothyroidism (which Hashimoto's can lead to), the thyroid gland fails. The hypothalamus (releases TRH) and pituitary (releases TSH) try to stimulate the thyroid. So, TRH and TSH levels increase. Symptoms like fatigue (due to low - energy metabolism from low thyroid hormones) and weight gain (slowed metabolism) are common.
• Graves' disease: It is a cause of hyperthyroidism. In hyperthyroidism, TSH levels are usually low (due to negative feedback from high thyroid hormones), so this is incorrect.
• Pituitary adenoma (if it's a TSH - secreting adenoma): Would cause high TSH, but TRH would be low (due to negative feedback from high TSH). So, this is incorrect.
• Tertiary hypothyroidism: Caused by hypothalamic dysfunction. TRH would be low (since the hypothalamus is the problem), and TSH would also be low (as the pituitary doesn't get enough TRH stimulation). So, this is incorrect.

Answer:

A. Hashimoto's