Which of the following is true of thyroid nodules during pregmancy
**Core Concept**
Thyroid nodules during pregnancy pose a significant clinical concern due to the potential for malignancy and the impact on maternal and fetal health. The thyroid gland undergoes physiological changes during pregnancy, leading to increased thyroid hormone production, which can affect the diagnosis and management of thyroid nodules.
**Why the Correct Answer is Right**
During pregnancy, the incidence of thyroid nodules increases due to the increased estrogen levels, which stimulate the growth of thyroid tissue. However, the risk of malignancy, particularly papillary thyroid carcinoma, also increases. The American Thyroid Association recommends that thyroid nodules larger than 1 cm in diameter be evaluated with fine-needle aspiration cytology (FNAC) during pregnancy, as the risk of malignancy is higher in larger nodules.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the risk of malignancy is not directly related to the number of thyroid nodules, but rather to their size and the presence of suspicious features on ultrasound.
**Option B:** This option is incorrect because the American Thyroid Association does not recommend routine thyroid function tests (TFTs) for all pregnant women with thyroid nodules, unless they have a history of thyroid disease or symptoms suggestive of hypothyroidism.
**Option C:** This option is incorrect because the risk of thyroid cancer is not increased in all thyroid nodules during pregnancy, but rather in those with suspicious features on ultrasound or a history of radiation exposure.
**Clinical Pearl / High-Yield Fact**
A key clinical pearl is to consider thyroid nodules larger than 1 cm in diameter as potentially malignant and to recommend FNAC for evaluation during pregnancy. This helps to minimize the risk of missing a malignant nodule and ensures appropriate management.
**Correct Answer:** A
Thyroid nodules larger than 1 cm in diameter should be evaluated with fine-needle aspiration cytology (FNAC) during pregnancy due to the increased risk of malignancy.