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KMID : 0378020070500110030
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New Medical Journal
2007 Volume.50 No. 11 p.30 ~ p.36
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Evaluation of USG Findings in Thyroid Papillary Carcinoma and Review of False Positive and False Negative Interpretations:Categorization of Thyroid Nodules
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Choi Bo-Bae
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Abstract
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Background and Objectives : The use of high-resolution sonography has resulted in increasing detection rate of thyroid cancer. Accordingly many studies about sonographic findings of thyroid cancer are carried out. Many reports say that there are considerable overlap of sonographic findings in benign and malignant nodules. In this study the frequencies of malignant sonographic findings in thyroid cancer are described, together with the false positive and false negative interpretations of sonographic findings.
Material and Methods : Between March 2008 and October 2008, fine-needle aspiration biopsies of thyroid nodules were performed on 589 nodules in 368 patients. Pathologic reports were malignant in 73 nodules and benign in 509 nodules. 7 nodules were reported as insufficient materials. Retrospectively malignant sonographic findings were reviewed in 73 nodules, and sonographic false positive and false negative findings were also evaluated.
Results: Final pathologic reports were malignant in 12.5% and benign in 87.5%. The frequencies of sonographic findings in thyroid cancer were calcifications in 37, taller than wide shape in 16, hypoechogenicity in 47, poorly defined margin in 46. The false positive and false negative interpretations were 20 individually.
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KEYWORD
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Thyroid cancer, Ultrasonograpy, Categorization
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