Email updates

Keep up to date with the latest news and content from BMC Clinical Pathology and BioMed Central.

Open Access Research article

Cervical lymph node metastases from thyroid cancer: does thyroglobulin and calcitonin measurement in fine needle aspirates improve the diagnostic value of cytology?

Enke Baldini1, Salvatore Sorrenti2, Cira Di Gioia3, Corrado De Vito4, Alessandro Antonelli5, Lucio Gnessi1, Giovanni Carbotta1, Eleonora D’Armiento1, Paolo Miccoli6, Enrico De Antoni2 and Salvatore Ulisse17*

Author affiliations

1 Department of Experimental Medicine, University of Rome, Rome, Italy

2 Department of Surgical Sciences, University of Rome, Rome, Italy

3 Department of Radiological, Oncological and Anato-Pathological Sciences, University of Rome, Rome, Italy

4 Department of Public Health and Infectious Diseases, “Sapienza” University of Rome, Rome, Italy

5 Department of Internal Medicine, University of Pisa, Pisa, Italy

6 Department of Surgery, University of Pisa, Pisa, Italy

7 Department of Experimental Medicine, “Sapienza”, University of Rome, Viale Regina Elena, 324, 00161, Rome, Italy

For all author emails, please log on.

Citation and License

BMC Clinical Pathology 2013, 13:7  doi:10.1186/1472-6890-13-7

Published: 19 February 2013

Abstract

Background

Measurement of thyroglobulin (Tg) protein in the washout of the needle used for fine needle aspiration biopsy cytology (FNAB-C) has been shown to increase the sensitivity of FNAB-C in identifying cervical lymph node (CLN) metastasis from well-differentiated thyroid cancer (TC). In this study, we evaluated whether routine measurement of Tg protein (FNAB-Tgp), Tg mRNA (FNAB-Tgm) and calcitonin (CT) mRNA (FNAB-CTm) in the FNAB washout of CLN increases the accuracy of FNAB-C in the diagnosis of suspicious metastatic CLN.

Methods

In this prospective study 35 CLN from 28 patients were examined. Histology showed metastatic papillary TC (PTC) in 26 CLN, metastatic medullary TC (MTC) in 3 CLN, metastatic anaplastic TC (ATC) in 3 CLN and 3 metastatic CLN from extra-thyroidal cancers.

Results

The overall accuracy of FNAB-C was 84.4%, reaching 95.7% when the analysis was restricted to PTC. Both FNAB-Tgp and FNAB-Tgm compared favorably with FNAB-C and shown diagnostic performances not statistically different from that of FNAB-C. However, FNAB-Tgp and FNAB-Tgm/FNAB-CTm were found useful in cases in which cytology results were inadequate or provided diagnosis inconsistent with patient's clinical parameters.

Conclusions

We demonstrated that FNAB-C, Tg/CT mRNA and Tg protein determination in the fine-needle washout showed similar accuracy in the diagnosis of metastatic CLN from TC. The results of this study suggest that samples for Tg protein and Tg/CT mRNA measurements from CLN suspicious for metastatic TC should be collected, but their measurements should be restricted to cases in which FNAB-C provides uninformative or inconsistent diagnosis with respect to patient's clinical parameters.

Keywords:
Thyroid cancer; Lymph node metastasis; Diagnosis; Thyroglobulin; Calcitonin; Fine-needle aspiration cytology; Follow-up