The sentinel lymph node in papillary cancer of the thyroid including histological subtype

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COD: 013-018 Categorie: ,

Laura Falvo, Antonella Marzullo, Silvio Palermo, Alessia Biancafarina, Matteo De Stefano, Benedetta Vanni, Salvatore Sorrenti, Antonio Catania

Ann. Ital. Chir., 2006; 77: 13-18

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BACKGROUND: The aim of this work was to reveal through sentinel node study the intraoperative presence of preoperatively
undetected pathological lymph nodes.
MATERIALS AND METHODS: At the Surgical Science Department of “La Sapienza” University of Rome The Authors studied
from January 2003 to June 2004 18 patients with papillary carcinoma of the thyroid, who presented no clinical
evidence of lymph node metastasis; they performed a total thyroidectomy in all cases, removing and histologically examining
all lymph nodes of the upper anterior mediastinum. Where negative they were then subjected to immunohistochemical
analysis with Pan Cytokeratin.
RESULTS: The method was positive in 10 patients: 2 pure papillary carcinomas, 1 papillary carcinoma with poorly differentiated
areas, 1 tall cell papillary carcinoma, 5 sclerosing carcinoma and 1 follicular variant papillary carcinoma;
and negative in 8: 5 pure papillary carcinomas, 2 sclerosing carcinoma and 1 case of follicular variant papillary carcinoma.
Lymph node micrometastasis was found in 2 cases through study with Pan Cytokeratin on final histological examination.
CONCLUSIONS: Analysis of the Authors’ preliminary data shows that sentinel lymph node detection has 83.3% sensitivity
and 100% specificity for Upper Anterior Mediastinum lymph nodes.
The Authors can propose two main applications: select for dissection only patients with a positive sentinel node and reduce
the number of cases to be subjected to postoperative treatment with iodine ablation, in patients with “low risk” thyroid
tumours and negative sentinel nodes.

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