ISSN 1470-3947 (print)
ISSN 1479-6848 (online)

Searchable abstracts of presentations at key conferences in endocrinology

Published by BioScientifica
Endocrine Abstracts (2010) 22 P805 
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Cytologic comparison between growing and non-growing benign thyroid nodules evaluated using two different growth criteria

Mehmet Muhittin Yalcin1, Serkan Yener1, Sena Yesil1, Baris Akinci1, Firat Bayraktar1, Abdurrahman Comlekci1, Sinan Unal1, Aytac Gullu2, Sevinc Biberoglu1 & Tulay Canda3

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Aim: Thyroid nodules are frequent in the adult population. Thyroid fine needle aspiration biopsy is the first choice for diagnosing cancer in the nodule. It is suggested that biopsy-proven benign thyroid nodules should be followed up clinically and if they grow, re-biopsy should be performed. However, certain growth criteria have not been defined yet.

Method: We retrospectively reviewed thyroid fine needle aspiration records of all patients seen in our clinic between January 2006 and June 2009. Growth follow-up of the nodules which had second thyroid fine needle aspiration biopsy were evaluated using two different growth criteria (at least 50% increase in nodule maximal diameter and at least 20% increase in nodule diameter with a minimum increase in two or more dimensions of at least two mm). Cytology results were compared using two different criteria.

Results: From a total of 4217 thyroid nodules, we evaluated the cytology results of the benign thyroid nodules which had follow up biopsies. There is no significant difference in cytological results between the growing group (n: 43) which have at least 50% increase in maximal nodule diameter and the non growing group (n: 136) (P: 1.00). Likewise, using the growth criteria of at least 20% increase in nodule diameter with a minimum increase in two or more dimensions of at least two mm, there was no significant difference in cytological results between growing (n: 47) and non growing (n: 70) benign thyroid nodules (P: 0.7).

Conclusion: According to two different growth criteria used in our study, growth of a benign nodule is not an additional risk factor for cancer.

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