Objective To explore the value of ultrasound-guided core needle biopsy (CNB) in diagnosis of thyroid nodules.Methods The clinical data of 395 patients with thyroid nodules who underwent ultrasound-guided CNB were retrospectively analyzed,and the results of CNB pathology of 278 patients who endured surgery were compared with postoperative wax pathology results.Results All patients completed CNB successfully and satisfaction rate for tissue samples was 100％.Local hematoma occurred in one case and relieved by conservative therapy.The CNB pathology results of 278 cases of patients were as follows:92 cases were malignancy,including 91 cases of papillary thyroid carcinoma,lcase of medullary thyroid carcinoma; 182 cases were benign,including lcase of parathyroid adenoma,48 cases of adenoma,and 133 cases of nodular goitre and other nodular affection.In 278 patients who underwent surgery,the CNB pathology results in 273 cases,including 90 malignancy cases and 183 benign cases,were consistent with postoperative wax pathology results and false positive occurred in 1 cases,ambiguous occurred in 4 cases.So the accuracy,sensibility,specificity,missed diagnosis rate,and misdiagnosis rate of ultrasound-guided CNB for differential diagnosis of thyroid malignant nodules from benign nodules were 98.20％ (273/278),95.79％ (91/95),99.45％ (182/183),4.21％ (4/95) and 0.55％ (1/183).Conclusion Ultrasound-guided CNB has important value on differential diagnosis of thyroid nodules.It is safe and effective.

Objective To discuss application of femoral neck anteversion′s correction in the treatment of children′s developmen-tal dysplasia of the hip .Methods 98 children diagnosed DDH from Jan 2006 to Jan 2010 were treated and followed up ranging from 12 to 48 months ,average 32 months .Before the operations ,FNA index were evaluated by X-ray and thin slice hip joint scan and 3D reconstruction to guide the rotary osteotomy .After the operations ,FNA index were rechecked .Results According to Mckay′s clas-sification ,clinical assessment was performed .84 hips were evaluated as excellent (73 .68% ) ,20 hips as good(17 .55% ) ,10 hips as acceptable(8 .77% ) ,and no poor hip (0% ) was reported .FNA decreased averagely 16 .3° ± 2 .0° .FNA had significant difference with themselves before the operations(P<0 .01) and had no significant difference with the normal side(P>0 .05) .Conclusion The change of FNA is one of the most important pathological changes .FNA′s correction is one of the most valuable to guarantee success operation .

Objective To compare the effect of titanium elastic nailing (TEN) and plating in treatment of both radius and ulna fractures in children older than 10 years.Methods This retrospective analysis comprised 38 children (50 sides) of both radius and ulna fractures treated with TEN (30sides) or plate (20 sides) between 2009 and 2014.Parameters compared between the two fixation methods were operation time,ratio of open/close reduction,time to internal fixation removal,incidence of postoperative complications,and bone union time.Anderson score was used to evaluate the treatment results.Results Operation time [(94.3 ± 39.5) min vs (120.5 ± 45.4) min],time to internal fixation removal [(210.8 ± 84.1) d vs (264.4 ± 88.9) d],and ratio of open/close reduction (20/10 vs 20/0)varied significantly between TEN and plating groups (P ＜ 0.05 or 0.01).Whereas,no statistically significant differences were noted in regard to complication rate,bone union time,and effect evaluation.Conclusion For fracture of the radius and ulna in children older than 10 years,TEN should be used for closed type without obvious displacement,but plate fixation is associated with lower incidence of fracture malunion and better outcome in treatment of open type with obvious displacement.

Aim To study the infuences of Haishengsu extracted from Tegillarca granosa on cultured tumor cells of lung cancer, breast cancer and carcinoma of stomach from human in vitro and its preventive antitumor effect on transplanted tumor in mice in vivo. Methods The inhibitory effect of Haishengsu on tumor cells proliferation was assayed by MTT method, and transplant tumor models of sarcoma 180 (S 180), Ehrlich ascites carcinoma (EAC), and hepatoma (Heps) were used. Before and after transplantation, different doses of Haishengsu were given to the mice for 10 days. The inhibition rates and life span of the mice were calculated. Results Haishengsu at concentrations of 0.5%～2.0% inhibited the proliferation of tested tumor cells in vitro,especially on lung cancer cells with a dose dependent manner (r= 0.974,P

Objective To establish a method for determination of dichloromethane in drinking water by purge and trap gas chro‐matography‐mass spectrometry .Methods Dichloromethane in drinking water was purged and trapped ,then desorbed and detected by using gas chromatography‐mass spectrometry .Quantitive analysis was conducted by using standard curve under selected ion mo‐nitoring (SIM) mode .Results The operation of this method was simple ,and its limit of detection (LOD) was 0 .005 ng/mL .The recovery rate was higher than 97% ,and the relative standard deviation was less than 5% .Conclusion The method may be appro‐priate to measure dichloromethane in drinking water .

BACKGROUND:Studies have shown that neural stem cel transplantation combined with exercise training can promote the recovery of hindlimb motor function from spinal cord injury in rats, but its mechanism of action has not been fuly elucidated. OBJECTIVE:To investigate the effects of early exercise training combined with neural stem cel transplantation on the recovery of hindlimb motor function in rats with spinal cord injury. METHODS:Sixty Sprague-Dawley rats with spinal cord injury were randomly divided into three groups: control group (n=20, given conventional treatment after injury), cel transplantation group (n=20, given neural stem cel transplantation after injury), experimental group, (n=20, given neural stem cel transplantation combined with early exercise training after injury). Recovery of the hindlimb motor function was assessed by Basso, Beattie and Bresnahan scale and inclined plane test before and at 1, 7, 14, 21 days after injury. Western blot assay was used to detect caspase-3 and myeloperoxidase expression. Hematoxylin-eosin staining was done at 21 days after injury to observe the structure changes of the injured spinal cord. RESULTS AND CONCLUSION:(1) Scores of Basso, Beattie and Bresnahan scale and inclined plane test were significantly better in the experimental group than the cel transplantation group folowed by the control group (P < 0.05). (2) In the control group, the expression of caspase-3 and myeloperoxidase was significantly increased at 14 days after injury. In the cel transplantation, the expression of caspase-3 and myeloperoxidase was significantly higher than the experimental group (P < 0.05). (3) Pathological inflammation was reduced most in the experimental group folowed by the cel transplantation group. In the experimental group, the structure of injured spinal cord was improved and became relatively clear and intact. These findings indicate that neural stem cell transplantation combined with early exercise training can effectively promote the recovery of hindlimb motor function from spinal cord injury in rats, by reducing the expression of caspase-3 and myeloperoxidase and alleviating secondary lesion of the spinal cord.

The gold hollow nanospheres have been synthesized by sacrificE-template method and the obtained sample has been characterized by TEM, SEM and XRD. The amperometric formaldehyde gas sensor was assembled with gold hollow nanospheres as the active electrode material and 1 mol/L KOH solution as electrolyte. The equation of linear regression(y=16.63x+4.063×10-7, r=0.9989)between the oxidation current(y(A))and the concentration of formaldehyde(x/(mol/L)) was obtained at the formaldehyde concentration in the range of 0 to 2.23×10-6 mol/L. The sensitivity of the sensor with gold hollow nanospheres as active material increased by about 70% compared with the sensor made of nanoparticles which had the same gold-loading in the work electrode, this method exhibits an advantage of decrease in the cost of the noble metal. This kind of sensor shows potential application in formaldehyde gas detection in this range due to its excellent sensitivity, stable response and good linear relationship.

ObjectiveTo study the diagnostic value of sonographic “Leopard pattern” sign in breast hyperplasia.MethodsTwo hundred and twenty-three female patients in Beijing Friendship Hospital from October 2012 to April 2013 were choosen. All the cases were diagnosed as mammary gland hyperplasia clinically, and their breast ultrasound images show the breast imaging-reporting and data system (BI-RADS) grad was 0 or 1. These patients were divided into 3 groups according to their age, Group A: 20 to 35 age (36 cases), Group B: 36 to 50 age (102 cases), and Group C: order than 50 year-old (85 cases). The pathological diagnosis were obtained by ultrasound guided breast biopsy. With pathological diagnosis as the gold standard and “Leopard sign” as ultrasound diagnostic criteria, the sensitivity, specificity, accuracy, positive predictive value and negative predictive value were calculated. The consistency between the ultrasonic and the pathological diagnosis were analyzed by Kappa statistical test.ResultThe diagnostic consistency test of the total sample of 223 cases: in terms of the ultrasonic Leopard sign” for the diagnosis of breast hyperplasia, the sensitivity was 69% (59/85),the specificity was 46% (64/138), the accuracy was 55% (123/223), the positive predictive value was 44% (59/133), the negative predictive value was 71% (64/90), the consistency was poor (Kappa=0.14,P<0.05). Group A:the sensitivity was 90% (18/20), the specificity was 50% (8/16),the accuracy was 72% (26/36), the positive predictive value was 69% (18/26), the negative predictive value was 80% (8/10), the consistency was good (Kappa=0.42, P<0.05);Group B:the sensitivity was 70% (33/47), the specificity was 49% (27/55),the accuracy was 59% (60/102), the positive predictive value was 54% (33/61), the negative predictive value was 66% (27/41), the consistency was poor (Kappa=0.19,P<0.05); Group C: the sensitivity was 44% (8/18), the specificity was 43% (29/67), the accuracy was 44% (37/85), the positive predictive value was 17% (8/46), the negative predictive value was 74% (29/39), the consistency was poor (Kappa=0.08,P<0.05).Conclusion“Leopard pattern” sign is not suitable as an independent standard in diagnosing breast hyperplasia disease.

Objective Purpose to study the domestic conditions of co-authorship in the field of dermatology and venereology in recent five years.Methods Taking 9 higher impact factor periodicals of the field as samples and using UCINET software to conduct research from following three perspectives,density,degree centrality,betweenness centrality and subgroup analysis.Results The density of co-authoring network is 0.3313.SUN Jian-fang possesses the highest value of degree centrality,and HUANG Chang-zheng's value of betweenness centrality is the highest.Ten 2-plexes are found in 122 core authors.Conclusions The study found that papers in this field have a high co-authored rate.But the lower network density and isolated nodes indicate that the connection between core authors is loose.There are more notable differences between active authors than inactive ones.The consistency of overall network is poor and other authors’ dependence of central authors is weak across the entire network.Meanwhile,authors of this field have not yet formed a subgroup phenomenon.

Purpose To investigate the safety and effectiveness of ultrasound-guided microwave ablation(MWA)in the treatment of abdominal wall endometriosis(AWE).Materials and Methods A total of 17 patients(19 lesions)with AWE who underwent MWA in Beijing Friendship Hospital from August 2014 to June 2023 were retrospectively analyzed.Grey-scale and color Doppler flow ultrasonography,and contrast-enhanced ultrasonography were used to observe the lesions before and after treatment.The AWE lesion volume,volume reduction rate,pain relief,and complications were recorded 3,6,and 12 months after treatment to evaluate the treatment efficacy.Results Contrast-enhanced ultrasound showed that all lesions underwent successful treatment with single MWA.The average initial nodule volume was(7.46±5.82)ml,which decreased significantly to(4.32±2.76)ml,(2.47±1.68)ml,(1.72±1.16)ml at 3,6 and 12 months follow-up(t=0.423,P=0.005;t=0.198,P=0.001;t=0.556,P=0.002)with a mean volume reduction rate of(46.18±24.36)%,(61.43±18.72)%,(74.25±13.26)%,respectively.Notably,all 17 patients experienced a significant decrease or complete alleviation of periodic abdominal incision pain at 12-month after treatment.One patient experienced local skin burns after the procedure,while the remaining patients did not experience severe complications.Conclusion MWA is safe and effective for treating AWE,and further research is warranted.