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Substernal Thyroid Biopsy Using Endobronchial Ultrasound-guided Transbronchial Needle Aspiration
Published on: November 10, 2014
Molecular markers in thyroid fine-needle aspiration biopsy: a prospective study
Carmen Franco1, Virginia Martínez, Juan Pablo Allamand
1Unidad de Anatomía Patológica, Clínica Santa María, Santiago, Chile. carmen.afranco@gmail.com
Applied Immunohistochemistry & Molecular Morphology : AIMM
|April 23, 2009
Summary
Molecular markers HBME-1 and galectin-3 improve the accuracy of indeterminate fine-needle aspiration biopsy (FNAB) results for thyroid nodules. Combining these markers enhances sensitivity, aiding in surgical decision-making for suspicious thyroid cases.
Area of Science:
- Endocrinology
- Surgical Pathology
- Oncology
Background:
- Fine-needle aspiration biopsy (FNAB) is crucial for preoperative evaluation of thyroid nodules.
- A significant limitation of FNAB is the 15-25% rate of indeterminate or suspicious samples.
- Follicular and Hürthle cell neoplasms fall into this indeterminate diagnostic category.
Purpose of the Study:
- To evaluate the diagnostic accuracy of HBME-1 and galectin-3 molecular markers.
- To compare marker performance in indeterminate/suspicious FNABs against definitive histologic diagnosis.
- To assess the utility of these markers in improving thyroid nodule preoperative assessment.
Main Methods:
- Prospective study conducted in Santiago, Chile (July 2003 - March 2008).
- 418 indeterminate/suspicious FNABs were immunostained for HBME-1 and galectin-3.
- Immunohistochemistry performed on FNAB-derived clots, results correlated with thyroidectomy histology.
Main Results:
- Individual marker sensitivities: HBME-1 (78.67%), galectin-3 (82.67%).
- Individual marker specificities: HBME-1 (84.13%), galectin-3 (80.95%).
- Combined marker performance: 94.74% sensitivity, 75.81% specificity.
Conclusions:
- Combined use of HBME-1 and galectin-3 increases sensitivity by 10% for indeterminate FNABs.
- These markers demonstrate excellent sensitivity and specificity in diagnosing thyroid neoplasms.
- The markers may enhance patient selection for surgical intervention, optimizing treatment pathways.
