So sánh giá trị của cộng hưởng từ khuếch tán và chọc hút kim nhỏ trong chẩn đoán xác định ung thư tuyến giáp

Compare between DWI and fnac in dignostis thyroid cancer

summa ry

Retrospective study on 21 patients (29 thyroid nodules: 21 benign nodules, 7 malignant nodules) who were acquired the diffusion-weighted magnetic resonance imaging (DW-MRI) with 200, 300, 400, 500, 600, 700, 800 b values and ADC maps were calculated, fine needle aspiration cytology (FNAC) were performed in 21 nodules. Diagnosis confirmed by postsurgical histopathologic examinations. Results: ADC values of nodules provide useful data about the nature of a thyroid nodule, with b200 DW-MRI, the mean ADC values of thyroid nodules were 1.45±0,30x10-3mm2/s in the malignant group and 2.26±0.33x 10-3mm2/s in the benign group, with significantly different (P< 0.001). According to an ADC cut-off value of 1.98x10-3mm2/s, the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy in differentiating benign from malignant thyroid nodules are calculated as 100%; 81%; 66.7%; 100% and 86.2%, respectively. The DW-MRI has the higher values than FNAC for diagnosis of thyroid cancer. We can applied DW-MRI for diagnosis of thyroid nodule in the