Preoperative Molecular Testing of Thyroid Nodules: Current Concepts

Area of Science:

• Oncology
• Molecular Diagnostics
• Endocrinology

Background:

• Cytologically indeterminate thyroid nodules require further assessment to determine malignancy risk.
• Current diagnostic methods may not always provide definitive results, leading to potential overtreatment or undertreatment.
• Adjuvant molecular testing offers a complementary approach to traditional cytologic evaluation.

Purpose of the Study:

• To discuss the role and application of commercially available molecular testing for indeterminate thyroid nodules.
• To explain the methodologies employed in these molecular assays.
• To provide guidelines on when to consider adjuvant molecular testing in clinical practice.

Main Methods:

• Development and optimization of molecular assays for fine needle aspiration biopsy samples.
• Utilizing gene expression, DNA, and RNA assessments to detect molecular alterations.
• Stratification of indeterminate thyroid nodules based on molecular findings.

Main Results:

• Molecular testing assays are commercially available and optimized for thyroid nodule biopsies.
• These tests can stratify indeterminate nodules into benign or suspicious categories.
• Results correlate with malignancy risk, similar to benign cytologic readings or indicating increased risk.

Conclusions:

• Molecular testing provides a robust tool for the adjuvant assessment of indeterminate thyroid nodules.
• These assays enhance diagnostic accuracy by identifying molecular alterations.
• Guidelines are essential for the appropriate utilization of molecular testing in thyroid nodule management.