Incidentally Found Thyroid Nodules in Women with no Previous Thyroid Disease: Its Significance.
10.3348/jkrs.2002.46.5.449
- Author:
Eun Kyung KIM
1
;
Cheong Soo PARK
;
Woung Youn CHUNG
;
Ki Keun OH
;
Jong Tae LEE
;
Hyung Sik YOO
Author Information
1. Department of Diagnostic Radiology, Research Institute of Radiological Science, Yonsei University. ekkim@yumc.yonsei.ac.kr
- Publication Type:Original Article
- Keywords:
Thyroid, US;
Thyroid, neoplasms;
Thyroid, biopsy
- MeSH:
Biopsy, Fine-Needle;
Breast;
Breast Diseases;
Carcinoma, Papillary;
Female;
Humans;
Lymph Nodes;
Neoplasm Metastasis;
Prevalence;
Prospective Studies;
Thyroid Diseases*;
Thyroid Gland*;
Thyroid Nodule*;
Transducers;
Ultrasonography
- From:Journal of the Korean Radiological Society
2002;46(5):449-453
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To determine the prevalence of thyroid nodules discovered incidentally at ultrasonography and to reassess their significance. MATERIALS AND METHODS: During a six-month period and using a high-frequency transducer, 1033 subjects with suspected breast disease underwent a prospective study of the thyroid. We determined the prevalence of thyroid nodules according to age, and the malignancy rate. RESULTS: Focal thyroid nodules were detected in 291 women (28.2%), their prevalence increasing with age (p<0.01). The nodules, totalling 337, were single in 260 cases (89.3%) and multiple in 31 (10.7%); 271 were less than 1 cm in diameter, 53 were 1-2 cm, and 13 were more than 2 cm [mean, 7.1(range, 2-34) mm]; 126 (37.4%) were pure cysts, 62 (18.4%) were mixed, and 149 (44.2%) were solid. Of the 149 solid nodules, 139 were hypoechoic. Eighty women (with 106 nodules) underwent fine-needle aspiration bipsy, and 35 (with 45 nodules) underwent surgery. It was discovered, finally, that 29 women (2.8%) had 35 malignancies, of which 33 were papillary carcinomas and two were carcinomas which had metastasized from a breast malignancy. Eleven women (37.9%) had extrathyroidal invasion and 6 (20.7%) had cervical lymph node metastasis despite incidentaloma. CONCLUSION: The prevalence of incidentally found thyroid nodules was 28.2%. Since the malignancy rate of these was relatively high, at 10.4%, the clinical significance of this finding should be reassessed.
