Objectlve To investigate the value of basic and contrast-enhanced ultrasound in the diagnosis of superficial cervical lymph nodes.Methods Five hundred and forty-five cases of superficial cervical lymph nodes were sacned by basic ultrasound,in which 52 cases were also scaned by contrast-enhanced ultrasound.All cases were performed ultrasound-guided biopsy.Lymph nodes were divided into benign group and malignant group according to pathology reports.The differences of the two groups were analysed,and statistical analysis was performed.Results Two hundred and thirty cases were benign,315 cases were malignant.S/L(P＜0.01),RI(P＜0.01),vascular pattern(P＜0.01)and contrast enhancement pattern(P＜0.01)between benign and malignant group showed statistical significant differences,while no statistical difference in coefficient correlation of the time-intensity curve between the two groups was found.Conclusions A combination of basic and contrastenhanced ultrasound can significantly enhance the ability to identify malignant lymph nodes from benign lymph nodes.

Objective To explore the feasibility of contrast-enhanced ultrasonograhy (CEUS) in preoperative classification of hepatocellular carcinoma (HCC) microvascular morphology.Methods Totally 94 HCC patients who underwent CEUS were analyzed retrospectively. And the offline Time-intensity curve (TIC) were drawn using SonoTumor. The tumor size, alpha fetoprotein (AFP), cirrhosis, Child-Pugh classifi cation, tumor differentiation and TNM stage were statistically analyzed. The intratumoralmicrovessels of HCC in 94 cases were evaluated by CD34 immunohistochemical staining. The relationship between intratumoral microvessel morphology and CEUS parameters were analyzed.Results CD34 immunohistochemical staining showed three distinct microvessel types in 94 cases of HCC: 28 cases of capillary-like type, 14 cases of sinusoid-like type and 52 cases of mixed type. There were no significant differences of clinical data among three microvascular morphology types. The parameters of peak strength (PE), rise time (RT), wash-in rate (WiR), wash-in perfusion index (WiPI), wash-in area under the curve (WiAUC) and mean transit time (MTT) in 28 cases of capillary-like type were (4350.7±2566.0) a.u, (10.7±3.2) s, (717.0±489.9) a.u, (12820.3±8331.6 )a.u, (128 240.8±74 487.1) a.u, (71.9±33.1)s. Those parameters in 14 cases of sinusoid-like type were (2471.6±1107.1) a.u, (16.2±4.2)s, (321.9±171) a.u, (5 561.4±2 938.0) a.u, (86 780.1±47 563.7) a.u, (117.8±69.6)s. And in 52 cases of mixed type they were (3563.2±2343.1) a.u, (14.1±4.8)s, (519.4±403.2) a.u, (9 015.3±6 884.7)a.u, (128 240.8±74 487.1) a.u, (71.9±33.1) s respectively. The CEUS parameters of WiR, WiPI in capillary-like type HCC patients were higher than sinusoid-like type and mixed type HCC patients, while RT was lower than sinusoid-like type and mixed type HCC patients, and the differences were signifi cant (WiR: t=3.87, 3.3, bothP=0.05; WiPI: t=2.96, 2.06, bothP=0.05; RT: t=3.19, 2.34, bothP=0.05). The parameter of PE in capillary-like type HCC patients were signifi cantly higher than that in sinusoid-like type HCC patients (t=2.51,P=0.05). And the parameter of PE in capillary-like type HCC patients was higher than mixed HCC patients, but there was no signifi cant difference. The parameters of PE, WiR and WiPI in mixed type HCC patients were higher than that in sinusoid-like type HCC patients, while RT in mixed type HCC patients were lower than that in sinusoid-like type HCC patients, but there were no signifi cant differences. No signifi cant differences of WiAUC and MTT were observed in HCC patients with different microvascular morphology.Conclusions There were signifi cant differences of CEUS parameters in different microvascular morphology types. And CEUS, as a non-invasive method, can be used for preliminary preoperative prediction of microvascular morphology in HCC patients.

Objective To evaluate the efficiency of thyroid ultrasound grading formulated by American Thyroid Association (ATA) and fine-needle aspiration (FNA) biopsy in diagnosing benign and malignant thyroid nodules.Methods A retrospective analysis of 357 thyroid nodules in 342 patients underwent surgical excision or FNA biopsy after thyroid ultrasound was performed.All ultrasonograms were graded according to ATA diagnosis guideline for thyroid nodule versi on 2015.The diagnostic efficiency of ATA grading and FNA biopsy were evaluated comparing with postoperative pathological results.Results There were 248 of 357 thyroid nodules confirmed with postoperative pathology,including 233 malignant and 15 benign nodules.The diagnostic accuracy,sensitivity,specificity,positive and negative predictive value of ATA guideline in diagnosis of malignant thyroid nodules was 88.31％ (219/248),90.99％ (213/233),46.67％ (7/15),96.36％ (212/220)and 25.00％ (7/28),respectively,while of FNA biopsy was 98.81％ (83/84),100％ (75/75),88.89 ％ (8/9),98.68％ (75/76) and 100％ (8/8),respectively.The area under the curve (AUC) of ROC was 0.653 and 0.944 for ATA grading and FNA biopsy,respectively (Z=2.397,P=0.017).Conclusion ATA guideline has high diagnostic value in differential diagnosis of thyroid nodules,while FNA may be more effective in diagnosis of thyroid nodules.

Objective To evaluate the diagnostic value of lymph node fine-needle aspiration (FNA)Epstein-Barr virus (EBV)-DNA concentration detection in nasopharyngeal carcinoma (NPC) cervical lymph node metastasis.Methods From August to December 2016,36 cases of NPC and 9 cases of other tumors (not correlated with EBV infection) were enrolled in this study at the Sun Yat-sen University Cancer Center.All patients received magnetic resonance images (MRI),plasma and cervical lymph node FNA EBV-DNA detection.Results The median concentration of EBV-DNA in FNA fluid (1.39 × 105 copies/ml) in cervical lymph node metastasis was significantly higher than that in plasma (2.00 × 103 copies/ml),with a significant difference (x2 =16.723,P =0.004).The diagnosis sensitivity,specificity,accuracy of the lymph node FNA fluid of EBV-DNA were 86.2％ (25/29),71.4％ (10/14) and 81.4％ (35/43) respectively,which were better than those of MRI [72.4％ (21/29),50.0％ (7/14) and 65.1％ (28/43) respectively] and plasma EBV-DNA [55.2％ (16/29),71.4％ (10/14) and 60.5％ (26/43) respectively].The area under the curve (AUC) of level Ⅰ b cervical lymph node metastasis was calculated,and FNA fluid EBV-DNA (AUC =0.688)was better than MRI (AUC =0.583),with a significant difference (Z =2.476,P =0.008).The EBV-DNA concentration in FNA fluid in cervical lymph node metastasis of patients with other tumors (no correlated with EBV infection) was 0 copy/ml.Conclusion FNA fluid EBV-DNA may improve the diagnostic sensitivity of cervical lymph node metastasis in nasopharyngeal carcinoma,and help to explore the clinical target volume neck nodes at level Ⅰ b cervical lymph node in radiotherapy.