Diagnostic Value Of High-frequency Ultrasound In Level Ⅵ Lymph Nodes Metastases Of Papillary Thyroid Carcinoma

Objective：To explore the value of high-frequency ultrasound in patientswith papillary thyroid carcinoma of level VI lymph node metastasis evaluation.Materials and methods:1. Collection of China-Japan Union Hospital ofJilin University in137cases of thyroid carcinoma with cervical lymph nodes ofthe patients, with scanning the neck region, according to the cervical partlymph node was recorded parts, and careful observation of the two-dimensionalgray scale ultrasound findings (including the number of lymph nodes, size,calcifications, liquefaction and aspect ratio etc.) performance and color dopplerultrasound. Judgment of benign and malignant lymph nodes was proposed forclinical reference according to the diagnosis standard of malignant lymph nodes,taking the result of postoperative pathologic diagnosis as the gold standard, theresults of ultrasound diagnosis to judgment the sensitivity, specificity, accuracyand false positive rate (misdiagnosis rate).2. Chi square test was performed using SPSS20.0software, enlargedlymph nodes of the district Ⅲ, Ⅳ and Ⅵ with ultrasound diagnostic, comparedthe sensitivity, specificity accuracy and misdiagnosis rate, whether there wassignificant difference.3. The lymph nodes were benign and malignant group, review theultrasonographic findings of benign and malignant lymph nodes, in patient age,gender, lymph node size, shape, aspect ratio, number of lymph nodecalcification and liquefaction of the differences have statistical significance.Results: Level of VI ultrasound diagnostic sensitivity was94.44%(51/54), specificity was6.90%(4/58), the accuracy rate was49.11%(55/112).level III, IV ultrasound diagnostic sensitivity was85.71%(42/49), specificity was72.41%(21/29), the accuracy rate was80.77%(63/78). Ultrasounddiagnosis of level VI and Ⅲ, Ⅳlymph nodes to compare the sensitivity withχ2=1.349, P>0.05, there was no significant difference. the specificity withχ2=40.525, P<0.01, the difference was statistically significant; the accuracy incomparison with χ2=19.585, P<0.01, the difference was statisticallysignificance. level VI lymph nodes false positive rate (misdiagnosis rate) was93.10%(54/58), levels of III, IV enlarged lymph nodes false positive rate(misdiagnosis rate) was27.59%(8/29), the false positive rate in comparisonwith χ2=40.525, P<0.01, the difference was statistically significant.Level of VI benign and malignant lymph nodes in patients with gender,lymph node size, lymph node calcification on whether or liquefied by chisquare test P values were0.000,0.031,0.002,0.029, there was significantdifference; patients with age, the number of lymph nodes, aspect ratio and therelationship between lymph node and position carcinoma of thyroid nodules bychi square test P values were0.583,0.325,0.666,0.067, there was nosignificant difference.Conclusion1. High frequency ultrasound in diagnosis the level of VI thyroid carcinomalymph with high rate of misdiagnosis, it was easy to overestimate the state ofan illness.2. The patients with gender, lymph node size、calcification and liquefactionare related to level VI lymph node metastases of papillary thyroid carcinoma.