Role of Duplex Power Doppler Ultrasound in Differentiation between Malignant and Benign Thyroid Nodules
Korean Journal of Radiology
;
: 594-602, 2010.
Article
in English
| WPRIM
| ID: wpr-150795
ABSTRACT
OBJECTIVE:
To evaluate the usage of duplex power Doppler ultrasound (PDUS) for the differentiation of benign and malignant thyroid nodules. MATERIALS ANDMETHODS:
We prospectively examined 77 thyroid nodules in 60 patients undergoing ultrasound-guided fine needle aspiration biopsy (FNAB). Each nodule was described according to size, inner structure, borders, parenchymal echogenicity, peripheral halo formation, and the presence of calcification (B-mode ultrasound findings). Vascularity as determined by PDUS imaging was defined as non-vascular, peripheral, central, or of mixed type. For each nodule, the pulsatility index (PI) and resistive index (RI) values were obtained. Results of FNAB and surgical pathological examination (if available) were used as a proof of final diagnosis to categorize all nodules as benign or malignant. A receiver operating characteristic (ROC) curve analysis was performed to establish cut-off, sensitivity, and specificity values associated with RI-PI values.RESULTS:
A significant relationship was observed between malignancy and irregular margins, microcalcifications, and hypoechogenicity on ultrasound examination (p 0.05). The central, peripheral, and mean RI-PI values were higher in malignant nodules when compared to the other cytologies (p < 0.05).CONCLUSION:
Vascularity is not a useful parameter for distinguishing malignant from benign thyroid nodules. However, RI and PI values are useful in distinguishing malignant from benign thyroid nodules.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Thyroid Neoplasms
/
Chi-Square Distribution
/
Prospective Studies
/
ROC Curve
/
Sensitivity and Specificity
/
Thyroid Nodule
/
Ultrasonography, Interventional
/
Ultrasonography, Doppler, Duplex
/
Statistics, Nonparametric
/
Biopsy, Fine-Needle
Type of study:
Diagnostic study
/
Observational study
/
Prognostic study
Limits:
Adult
/
Aged
/
Female
/
Humans
/
Male
Language:
English
Journal:
Korean Journal of Radiology
Year:
2010
Type:
Article
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