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Accuracy of sentinel lymph node in papillary thyroid carcinoma
J Arch-Ferrer1, D Velázquez, R Fajardo
1Department of Surgery, Instituto Nacional de Ciencias Médicas y Nutricíon, Tlalpan, Mexico City, Mexico.
Surgery
|December 14, 2001
Summary
Sentinel lymph node biopsy is highly accurate for diagnosing papillary thyroid carcinoma metastases. Immunohistochemistry significantly improves detection rates, making it a reliable method for staging this cancer.
Area of Science:
- Oncology
- Surgical Pathology
Background:
- Sentinel lymph node biopsy (SLNB) is an established technique for staging various cancers.
- Its utility in papillary thyroid carcinoma (PTC) requires further evaluation.
Purpose of the Study:
- To assess the diagnostic accuracy of sentinel lymph node biopsy in patients with papillary thyroid carcinoma.
Main Methods:
- 22 PTC patients underwent SLNB using isosulfan blue dye.
- Sentinel nodes were resected along with central and jugular compartment lymph nodes.
- Histopathological analysis included H&E staining and immunohistochemistry (cytokeratin-7) for negative nodes.
Main Results:
- A sentinel node was identified in 20/22 patients.
- Conventional histology detected metastases in 60% (12/20) of sentinel nodes.
- Immunohistochemistry increased sentinel node metastasis detection to 100%, accurately identifying nodal staging.
Conclusions:
- Sentinel lymph node biopsy is a highly accurate method for detecting metastases in papillary thyroid carcinoma.
- Immunohistochemistry is crucial for maximizing the sensitivity of sentinel node analysis in PTC.