Publication date: Available online 5 July 2017
Source:American Journal of Otolaryngology
Author(s): Bilici Suat, Yiğit Özgür, Onur Fırat, Hamit Bahtiyar, Nazlı Mehmet Ali, Günver Feray, Karagöz Yeşim
ObjectiveTo determine the predictability of sonography for detection of calcifications in thyroid nodules by histopathologic examination and to demonstrate the association between calcification pattern and malignancy.MethodsWe prospectively evaluated 81 dominant nodules from 81 patients. Thyroid glands were assessed preoperatively with thyroid ultrasonography, and the presence of sonographic calcification was specified as intranodular coarse and micro calcification. Micro and coarse calcification in surgery specimens were specified postoperatively as present or absent in the histopathological evaluation. The correlation between sonographic and histopathologic calcifications and the relationship between malignancy and calcification patterns were determined.ResultsCalcification was detected histopathologically in 66.7% of the sonographically calcified nodules and in 12.8% of the sonographically noncalcified nodules. The sensitivity and specificity of sonography for detecting histopathologic calcification were 84.8 and 70.8%, respectively, while positive and negative predictive values were 66.7 and 87.2%, respectively. The sonographical and histopathological outcomes for detection of coarse and micro calcification showed 85 and 50% compatibility, respectively. The difference in malignancy rates between sonographic coarse and micro calcified nodules was not significant (p<0.976). Histopathologic detection of calcification showed no significant difference between malignant and benign nodules (p<0.129).ConclusionHistopathology confirmed a high rate of sonographic macrocalcifications. The micro and macro patterns of sonographic calcification showed no particular association with thyroid malignancy. The preoperative risk of malignancy should be determined in conjunction with other known sonographic risk factors and diagnostic tests.
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