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Calcitonin measurement on fine needle washouts: Preanalytical Issues and Normal Reference Values.
MedLine Citation:
PMID:  22144096     Owner:  NLM     Status:  Publisher    
Calcitonin (CT) measurement on fine-needle aspiration cytology (FNAC) washouts (FNAC-CT) is a promising tool in the diagnosis of medullary thyroid carcinoma (MTC). Guidelines for the method with codified cut-off are needed to use this technique in clinical routine. This study was undertaken to assess the best pre-analytical procedure and to define a reliable reference value for FNAC-CT. Fifty-four patients underwent thyroid surgery, so MTC was excluded by surgical pathology examination and CT immunostains. Before surgery, FNAC-CT was measured on 78 thyroid nodules from such 54 patients. Needles were rinsed by normal saline and specific CT-free dilution buffer, and CT was measured by a fully automated immunochemiluminometric assay. FNAC-CT levels were not significantly different in normal saline or specific buffer. The calculated 97.5th upper FNAC-CT value was 8.5 pg/mL (saline) and 7.43 pg/mL (buffer), respectively. Seeing its relatively large sample size, rigorous selection criteria and inclusion of CT immunostaining of thyroid nodules, the present study provides a reliable guideline and a clinically relevant reference value for FNAC-CT measurement in thyroid nodules. Diagn. Cytopathol. 2011; © 2011 Wiley Periodicals, Inc.
Luca Giovanella; Luca Ceriani; Massimo Bongiovanni
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-12-5
Journal Detail:
Title:  Diagnostic cytopathology     Volume:  -     ISSN:  1097-0339     ISO Abbreviation:  -     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-12-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8506895     Medline TA:  Diagn Cytopathol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Wiley Periodicals, Inc.
Department of Nuclear Medicine and Thyroid Centre, Oncology Institute of Southern Switzerland, CH-6500 Bellinzona, Switzerland; Department of Clinical Chemistry and Laboratory Medicine, Ente Ospedaliero Cantonale, CH-6500 Bellinzona, Switzerland.
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