For a suspicious thyroid nodule, which diagnostic step is commonly used to obtain tissue for evaluation?

For a suspicious thyroid nodule, which diagnostic step is commonly used to obtain tissue for evaluation?

• A. Ultrasound imaging.
• B. Serum TSH level.
• C. Computed tomography.
• D. Fine-Needle Aspiration.

Answer: (D)

The main thing being tested is how to obtain tissue from a suspicious thyroid nodule for direct evaluation. The best approach is ultrasound-guided fine-needle aspiration. A thin needle is inserted into the nodule and cells are aspirated so a cytology specimen can be examined under a microscope. This method is minimally invasive, can be done outpatient, and, when performed by an experienced clinician, provides reliable information to distinguish benign from malignant nodules, guiding subsequent management such as surveillance or surgery. Ultrasound imaging, while essential for characterizing the nodule and guiding sampling, does not itself provide tissue. Serum TSH assesses thyroid function, not tissue pathology. Computed tomography can visualize anatomy but does not yield cytology and is not the standard method for obtaining tissue from a thyroid nodule. Fine-needle aspiration is the procedure that directly yields the cells needed for diagnostic evaluation.

The main thing being tested is how to obtain tissue from a suspicious thyroid nodule for direct evaluation. The best approach is ultrasound-guided fine-needle aspiration. A thin needle is inserted into the nodule and cells are aspirated so a cytology specimen can be examined under a microscope. This method is minimally invasive, can be done outpatient, and, when performed by an experienced clinician, provides reliable information to distinguish benign from malignant nodules, guiding subsequent management such as surveillance or surgery.

Ultrasound imaging, while essential for characterizing the nodule and guiding sampling, does not itself provide tissue. Serum TSH assesses thyroid function, not tissue pathology. Computed tomography can visualize anatomy but does not yield cytology and is not the standard method for obtaining tissue from a thyroid nodule. Fine-needle aspiration is the procedure that directly yields the cells needed for diagnostic evaluation.