Shujian Li, Presenter: Nothing to Disclose

To observe the value of diffusion-weighted imaging(DWI)and ADC value in the diagnosis and differential diagnosis of benign and malignant lesions of the tongue. 

75 patients with lingual lesions, including 32 benign lesions and 43 malignant tumors underwent conventional MRI, contrast-enhanced MRI and DWI with b values of 0 and 1000 s/mm2 before therapy . ADC maps were reconstructed, and the ADC values of the lingual lesions were calculated. The receiver operating characteristic curves(ROC) were constructed using optimal cut point of ADC to differentiate between benign lesions and malignant tumors of the tongue. The areas under the ROC curve for ADC were also calculated. 

The mean ADC of benign lesions was (1.84±0.47) × 10-3mm2/s. The mean ADC of malignant tumors was (1.12±0.21) × 10-3mm2/s. Malignant tumors had lower ADCs than benign lesions (t= - 8.038, P＜0.000). The areas under the ROC curves of ADC diagnosing benign and malignant lesions of the tongue was 0.957±0.022. By using optimal cut point of 1.30×10-3mm2/s for ADC of the lesion, the sensitivity, specificity and accuracy was 90.7%, 93.9% and 92%. Compared with pathological results, ADC had high correlations (Kappa values were 0.813). 

Diffusion-weighted imaging can be applied as a complementary tool in the detection of benign and malignant lesions of the tongue.

Diffusion-weighted imaging can be applied as a complementary tool in the detection of benign and malignant lesions of the tongue.

Li, S, Value of Diffusion-weighted Imaging in the Diagnosis of Benign and Malignant Lesions of the Tongue .  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14045559.html