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Fine-needle aspiration of thyroid nodules: past, present, and future
Zubair W Baloch1, Virginia A LiVolsi
1Department of Pathology and Laboratory Medicine, University of Pennsylvania Medical Center, Philadelphia, Pennsylvania 19103, USA.
Insights
Thyroid fine-needle aspiration biopsy is a highly sensitive and specific tool for diagnosing thyroid nodules. This minimally invasive procedure offers accurate results with minimal patient discomfort and complications.
Area of Science:
- Endocrinology
- Cytopathology
- Surgical Pathology
Background:
- Thyroid nodules are common, and accurate diagnosis is crucial for appropriate management.
- Fine-needle aspiration biopsy (FNAB) is a primary diagnostic tool for evaluating thyroid nodules.
Purpose of the Study:
- To review traditional and recent techniques for thyroid fine-needle aspiration biopsy.
- To discuss applications and diagnostic categories of thyroid FNAB.
Main Methods:
- Cytologic features and differential diagnoses of thyroid lesions are described.
- Recommendations for diagnostic categories are outlined.
- Emerging techniques for thyroid nodule FNAB are discussed.
Main Results:
- Thyroid FNAB demonstrates high sensitivity and specificity, particularly for papillary thyroid carcinoma.
- Specimen adequacy and operator expertise significantly impact diagnostic accuracy.
- On-site evaluation improves specimen sampling and reduces nondiagnostic rates.
Conclusions:
- Thyroid FNAB is an effective, well-accepted diagnostic tool for thyroid nodules.
- The procedure is associated with minimal patient discomfort and complications.
- Further research is needed for molecular markers in differentiating follicular thyroid lesions.
Objective:
To present a review of the traditional and more recent techniques and applications of thyroid fine-needle aspiration biopsy.
Methods:
We describe the cytologic features and differential diagnoses of various thyroid lesions, outline recommendations for diagnostic categories, and discuss new techniques that have shown some promise in the diagnosis of thyroid nodule fine-needle aspiration specimens.
Results:
Fine-needle aspiration biopsy of the thyroid has proved to be an excellent diagnostic tool in the initial management of thyroid nodules. Numerous studies have shown its high sensitivity and specificity in diagnosing malignant tumors of the thyroid, especially papillary thyroid carcinoma. As with other diagnostic tests, however, its effectiveness is highly dependent on the expertise of the operator performing the procedure and the adequacy of the specimen for interpretation of the cytomorphologic features. On-site evaluation of thyroid specimens promotes adequate specimen sampling and reduces the incidence of nondiagnostic specimens. Diagnostic reports on thyroid fine-needle aspiration should include patient demographics and pertinent clinical history, site and size of the thyroid nodule, mode of aspiration, number of needle passes, assessment of specimen adequacy, diagnosis, and recommendations. Although immunohistochemical and molecular markers have received considerable attention recently, additional studies are needed before they can be used to separate benign from malignant follicular thyroid lesions.
Conclusion:
Overall, fine-needle aspiration biopsy of thyroid nodules has proved to be sensitive, specific, and well accepted by patients because of minimal discomfort and complications.
