Goiter formation is a feature of which conditions?

Goiter formation is a feature of which conditions?

• A. Hypothyroidism only
• B. Hyperthyroidism only
• C. Both hypothyroidism and hyperthyroidism
• D. Neither

Answer: (C)

Goiter is enlargement of the thyroid gland that happens when the gland is chronically stimulated or damaged, and this can occur regardless of whether thyroid hormone levels are low or high. In hypothyroidism, low levels of thyroid hormone reduce negative feedback to the pituitary, causing increased TSH. This prolonged TSH stimulation prompts the thyroid to grow, producing a goiter. In hyperthyroidism, the gland is overactive, and autoimmune processes or nodular changes can drive growth of thyroid tissue, leading to a goiter as well. Because goiter results from growth in response to stimulation or injury rather than a single hormonal state, it can be a feature of both hypothyroidism and hyperthyroidism.

Goiter is enlargement of the thyroid gland that happens when the gland is chronically stimulated or damaged, and this can occur regardless of whether thyroid hormone levels are low or high.

In hypothyroidism, low levels of thyroid hormone reduce negative feedback to the pituitary, causing increased TSH. This prolonged TSH stimulation prompts the thyroid to grow, producing a goiter. In hyperthyroidism, the gland is overactive, and autoimmune processes or nodular changes can drive growth of thyroid tissue, leading to a goiter as well. Because goiter results from growth in response to stimulation or injury rather than a single hormonal state, it can be a feature of both hypothyroidism and hyperthyroidism.