Question

Which of the following is not a reason for primary hypothyroidism?

1) Autoimmune disease
2) Iodine deficiency
3) Pituitary gland dysfunction
4) Excessive production of thyroid hormones

Answer 1

Excessive production of thyroid hormones is not a cause of primary hypothyroidism but is rather a characteristic of hyperthyroidism, such as in Graves' disease.

Step-by-step explanation:

The option that is not a reason for primary hypothyroidism is excessive production of thyroid hormones. Primary hypothyroidism is characterized by low thyroid hormone production, which could be due to autoimmune diseases like Hashimoto's thyroiditis, iodine deficiency causing goiter, or surgical removal of the thyroid gland.

However, excessive production of thyroid hormones is actually indicative of hyperthyroidism and conditions like Graves' disease, not hypothyroidism.