Which autoimmune thyroiditis is the leading cause of hypothyroidism and carries an increased risk for thyroid malignancy?

Which autoimmune thyroiditis is the leading cause of hypothyroidism and carries an increased risk for thyroid malignancy?

• A. Hashimoto's thyroiditis
• B. Graves disease
• C. De Quervain thyroiditis
• D. Goiter

Answer: (A)

Autoimmune thyroiditis that progressively destroys the gland leads to hypothyroidism. In regions with enough iodine, Hashimoto’s thyroiditis is the most common cause of this condition because the immune system attacks thyroid tissue, causing chronic inflammation, gradual loss of thyroid hormone production, and eventual hypothyroidism. This same chronic inflammatory milieu also increases the risk of developing thyroid lymphoma, a type of thyroid malignancy, making Hashimoto’s the autoimmune thyroiditis most associated with cancer risk. The other options don’t fit both parts: Graves disease causes hyperthyroidism, not hypothyroidism; De Quervain thyroiditis is a transient, painful inflammation; and goiter is simply an enlarged thyroid that can arise from various causes and isn’t specifically tied to autoimmune destruction or a heightened cancer risk.

Autoimmune thyroiditis that progressively destroys the gland leads to hypothyroidism. In regions with enough iodine, Hashimoto’s thyroiditis is the most common cause of this condition because the immune system attacks thyroid tissue, causing chronic inflammation, gradual loss of thyroid hormone production, and eventual hypothyroidism. This same chronic inflammatory milieu also increases the risk of developing thyroid lymphoma, a type of thyroid malignancy, making Hashimoto’s the autoimmune thyroiditis most associated with cancer risk. The other options don’t fit both parts: Graves disease causes hyperthyroidism, not hypothyroidism; De Quervain thyroiditis is a transient, painful inflammation; and goiter is simply an enlarged thyroid that can arise from various causes and isn’t specifically tied to autoimmune destruction or a heightened cancer risk.