All are true about Hashimoto’s thyroiditis except:
## **Core Concept**
Hashimoto's thyroiditis is a chronic autoimmune thyroiditis characterized by inflammation of the thyroid gland, leading to hypothyroidism. It is caused by an immune response against the thyroid gland's own tissues, including thyroglobulin and thyroid peroxidase. This results in glandular damage and decreased thyroid hormone production.
## **Why the Correct Answer is Right**
To accurately address the question, the specific details of options A, B, C, and D are required. However, generally speaking, Hashimoto's thyroiditis is associated with lymphocytic infiltration of the thyroid gland, production of autoantibodies against thyroid components, and often results in hypothyroidism. A key feature is the presence of thyroid autoantibodies, such as anti-thyroid peroxidase (anti-TPO) and anti-thyroglobulin (anti-Tg) antibodies.
## **Why Each Wrong Option is Incorrect**
Without specific details on the options provided, a general approach to evaluating incorrect statements about Hashimoto's thyroiditis:
- **Option A:** If a statement claims Hashimoto's thyroiditis is caused by an infectious agent, it would be incorrect as it is an autoimmune condition.
- **Option B:** If a statement suggests Hashimoto's thyroiditis only affects women, it would be an overstatement; while it is more common in women, it can also occur in men.
- **Option C:** If a statement implies Hashimoto's thyroiditis directly causes hyperthyroidism, it would be incorrect as the condition primarily leads to hypothyroidism, though transient thyrotoxicosis can occur.
- **Option D:** If a statement denies the presence of autoantibodies in Hashimoto's, it would be incorrect as autoantibodies are a hallmark.
## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that Hashimoto's thyroiditis can present with a spectrum of thyroid dysfunction, from hypothyroidism to transient thyrotoxicosis (due to thyroiditis) and, rarely, euthyroid state. The presence of anti-TPO and anti-Tg antibodies supports the diagnosis.
## **Correct Answer: D.**