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KMID : 1202020090020010038
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Journal of Korean Thyroid Association
2009 Volume.2 No. 1 p.38 ~ p.44
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Prevalence of Thyroid Nodules and Thyroid Cancers
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Kim Dae-Kyum
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Abstract
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Background and Objectives: Thyroid nodules are common and the incidence of thyroid cancer is rapidly increasing. Unlike other countries, incidence rate is highest in middle-aged people in Korea. The objective of this study was to determine the prevalence of thyroid nodules and thyroid cancers in a community clinic.
Materials and Methods: Patients who visited Hyochon-prun clinic in Daejeon between July 2008 and Sep. 2008 were examined with high resolution ultrasonography and fine needle aspiration cytology (FNAC) after clinical evaluation.
Results: Thyroid nodules were detected in 323 patients (28.7%) out of 1,125 subjects and the most prevalent age group was a group of more than 60 years. With palpation, the nodules were detected in 62 patients (5.5%) out of 1125 subjects. Five (7.2%) out of 70 nodules were malignant on FNAC, 8 (11.4%) suspicious, 1 (1.4%) indeterminate, 49 (70.0%) benign, and 7 (10.0%) inadequate for diagnosis. Thyroid cancer was diagnosed in 11 patients postoperatively and age-standardized prevalence of thyroid cancer was expected 8.5 per 1,000 persons. The most prevalent age group of thyroid cancer was a group of more than 60 years. Five patients (83.3%) out of 6 thyroid cancer patients who were more than 60 years were high-risk in AMES prognostic category.
Conclusion: Prevalence of thyroid nodules and thyroid cancers is high and increased with age.
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KEYWORD
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Thyroid nodule, Thyroid cancer, Prevalence
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