Abstract:
OBJECTIVE:The objective of this retrospective study was to develop and validate a simple diagnostic prediction model by using ultrasound (US) features of thyroid nodules obtained from multicenter retrospective data. MATERIALS AND METHODS:Patient data were collected from 20 different institutions and the data included 2000 thyroid nodules from 1796 patients. For developing a diagnostic prediction model to estimate the malignant risk of thyroid nodules using suspicious malignant US features, we developed a training model in a subset of 1402 nodules from 1260 patients. Several suspicious malignant US features were evaluated to create the prediction model using a scoring tool. The scores for such US features were estimated by calculating odds ratios, and the risk score of malignancy for each thyroid nodule was defined as the sum of these individual scores. Later, we verified the usefulness of developed scoring system by applying into the remaining 598 nodules from 536 patients. RESULTS:Among 2000 tumors, 1268 were benign and 732 were malignant. In our multiple regression analysis models, the following US features were statistically significant for malignant nodules when using the training data set: hypoechogenicity, marked hypoechogenicity, non-parallel orientation, microlobulated or spiculated margin, ill-defined margins, and microcalcifications. The malignancy rate was 7.3% in thyroid nodules that did not have suspicious-malignant features on US. Area under the receiver operating characteristic (ROC) curve was 0.867, which shows that the US risk score help predict thyroid malignancy well. In the test data set, the malignancy rates were 6.2% in thyroid nodules without malignant features on US. Area under the ROC curve of the test set was 0.872 when using the prediction model. CONCLUSION:The predictor model using suspicious malignant US features may be helpful in risk stratification of thyroid nodules.
journal_name
Korean J Radioljournal_title
Korean journal of radiologyauthors
Kwak JY,Jung I,Baek JH,Baek SM,Choi N,Choi YJ,Jung SL,Kim EK,Kim JA,Kim JH,Kim KS,Lee JH,Lee JH,Moon HJ,Moon WJ,Park JS,Ryu JH,Shin JH,Son EJ,Sung JY,Na DG,Korean Society of Thyroid Radiology (KSThR).,Korean Sdoi
10.3348/kjr.2013.14.1.110subject
Has Abstractpub_date
2013-01-01 00:00:00pages
110-7issue
1eissn
1229-6929issn
2005-8330journal_volume
14pub_type
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