Objective:To compare and analyze the value of diffusion weighted imaging (DWI) and apparent diffusion coefficient (ADC) of 1.5T magnetic resonance (MR) in differential diagnosis for localized prostate cancer, chronic inflammatory response and benign hyperplasia.Methods: 80 patients with localized prostate cancer were enrolled in the research. The signal to noise ratio (SNR) of DWI, ADC value and semi-quantitative classification of DWI on lesions were measured, and the diagnostic efficiencies of them were compared by using ROC curve.Results: In the 80 patients with localized prostate cancer patients, there were 52 malignant lesions and 43 benign lesions in peripheral band, and there were 31 malignant lesions and 46 benign lesions in central gland. The ADC values of prostate cancer in peripheral band and central gland were 0.91±0.12 and 0.86±0.15, respectively, and they were significantly lower than that of normal tissue (1.68±0.23 and 1.28±0.31) and benign lesions (1.24±0.21 and 1.12±0.16). The semi-quantitative classifications of DWI for benign lesions were significantly higher than that for malignant lesions in peripheral band and central gland, respectively (x2=20.88,x2=12.14;P<0.05). For the diagnostic efficiency of ADC, the sensitivities of benign and malignant lesions in peripheral band and malignant gland were 91.3% and 79.1%, respectively, and the specificities of them were 89.6% and 70.2%. And they was significant higher than the corresponding sensitivities (71.2% and 51.3%)and specificities (78.4% and 65.8%) of DWI imaging.Conclusion: Both of DWI and ADC of 1.5T magnetic resonance are the important indexes in differential diagnosis for prostate cancer, chronic inflammatory response and benign hyperplasia, while ADC value is better than DWI image in the clinical efficiency.

Objective To evaluate the clinical application value of CT angiography(CTA) in detection of the accessory renal artery(ARA).Methods The renal artery CTA in 100 cases was reconstructed retrospectively with volume rendering (VR), multiplanar reconstruction (MPR), maximum density projection (MIP) and curved surface reconstruction (CPR).Results In all 200 kidneys,ARA were 47 with an incidence of 23.5% (47/200).The incidence of ARA in male and female were about 17% and 13%, and there was no significant difference between them.The ARA in the upper pole of the kidney was 25 (53.1%), and in lower pole was 22 (46.9%).It was showed on MIP with a display rate of 100%, on MRP of 93.6%, on VR of 90.4% and on CPR of 85.1%.Conclusion CTA is a safe, rapid, noninvasive and economical method for the diagnosis of ARA.It is helpful for surgical renal operation, interventional therapy and renal transplantation.

Objective To retrospectively summarize the normal reference range of trachea wall thickness,lumen diameter,wall area and wall area ratio[WA%=mean wall area/(mean wall area+lumen area)]of Chinese healthy adults,and its related factors. Also,to observe the difference of inner diameter between superior and inferior bronchus.Methods Based on computer measurement techniques of bronchus,a CT quantitative analysis was carried out in 701 cases of normal healthy people who had negative results in lung cancer screening of health examination at our hospital.Results The value of trachea wall thickness,lumen diameter,wall area and wall area ratio was(1.322 mm,18.024 mm,78.93 mm2 ,0.27)respectively.In different gender,the trachea wall thickness,lumen diameter,wall area and wall area ratio had statistical significance (P<0.05).Also,they had good consistency with gender (r=-0.512,-0.472,-0.559,0.315).In different gender and age,the difference of inner diameter between the superior bronchus and inferior bronchus was always a positive value.Conclusion The CT quantitative analysis method has advantages of convenience,direct-vie-wing and accuracy.It is good for quantitative detection and research of bronchus structure.Bronchial wall thickness,lumen diameter, wall area and wall area ratio have significant difference because of gender.The inner diameter of superior bronchus is always greater than that of the inferior bronchus.

BACKGROUND:Liver regeneration is the key factor influencing the prognosis of living donor liver transplantation. There has not been the research on special miRNA of liver regeneration after living donor liver transplantation. OBJECTIVE:To analyze the variation of miRNAs expression profile after rat reduced-size liver transplantation at certain time point, select and verify target miRNA which can provide targeting intervention strategies in liver regeneration after rat reduced-size liver transplantation and provide theoretical evidence for liver regeneration after living donor liver transplantation.METHODS:The reduced-size liver transplantation models were established. miRNAs microarray was used to detect miRNA expression. In differentialy expressed microRNAs, real-time quantitative PCR was utilized to detect target miRNAs. The credibility of miRNAs microarray results was verified. RESULTS AND CONCLUSION:Compared with rat liver tissue in the sham operation group, 11 miRNAs up-regulated in reduced-size liver transplantation, including let-7b-5p, let-7c-5p, miR-101a-3p, miR-103-3p, miR-130a-3p, miR-142-5p, miR-186-5p, miR-199a-3p, miR-21-5p, 221-3p and miR-34a-5p. Four miRNAs were down-regulated, including miR-26b-5p, miR-150-5p, miR-19a-3p and rno-miR-146-5p. PCR test further verified that miR-221-3p and miR-199a-3p expression changes approximated the chip results at 24, 48 hours and 1 week, indicating that results of miRNA microarray were believable. These results verified that it exists variation of miRNAs expression profile after rat reduced-size liver transplantation, which picked out and verified the target miRNAs.

Objective To study the applied value of multi-slice spiral CT(MSCT)in pulmonary lesions.Methods 68 cases with massive hemoptysis caused by lung tumor or other reasons underwent 16-slice spiral CT scan including plain and contrast-enhanced scan.Volume reconstruction(VR),multiplanar reconstruction(MPR),maximum intensity projection(MIP)and curved planar reconstruction(CPR)were performed using original images.The origin,number and shape of vessels feeding lesions were observed.Results Among 68 cases(two failed),the blood supply of pulmonary lesions was from bronchial artery in 60 cases,from the intercostals artery in 8 cases,from the internal thoracic artery in 5 cases,from the left subclavian artery in 6 cases,from the right inferoir phrenic artery in 5 cases,from the celiac trunk artery in 3 case and from the right renal artery in 1 case.The blood supply was from single artery in 50 cases,double arteriae in 10 cases and three arteriae in 6 cases.The supply arteriae were vascular plexus in 55 cases,meandering in 8 cases,net in 2 cases and aneurysm formation in one cases.Conclusion MSCT can clearly display the vessels feeding pulmonary lesions.

Objective To investigate the relationship of serum resistin and pancreatic necrosis in the patients with severe acute pancreatitis. Methods Twenty-eight patients with SAP admitted to our hospital from March 2008 to November 2008 were divided into two groups according to the CT scan imaging: necrotic group and non-necrotic group. The enzyme-linked immunosorbent assay (ELISA) was used to test the serum resistin levels. An ROC curve was depicted to predict the pancreas necrosis. Results There were 21 patients in the non-necrotic group and 7 in the necrotic group, and there was no significant difference in terms of sex, age and baseline disease (P>0.05). The resitin levels ranged from 0.1730 ng/ml to 7.4923 ng/ml, with a mean (3.7102±1.6987) ng/ml. The area under the curve of resistin values was 0.884±0.108 (95%CI:0.672～1.097), asymptote signals 0.003, then it was calculated that P=0.003, which was>0.50. Conclusions The serum resistin may be of clinical value to predict the pancreatic necrosis.

Background: Resistin level is high in patients with severe acute pancreatitis (SAP), and resistin is expected to be a new marker for evaluating the severity of acute pancreatitis. Objective: To explore the influence of integrated traditional Chinese and Western medicine therapy on serum resistin levels in SAP patients. Design, setting, participants and interventions: Twenty-eight SAP patients meeting inclusion criteria from Department of Integrated Traditional Chinese and Western Medicine, West China Hospital, Sichuan University were included, and the patients were randomly divided into treatment group and placebo group. There were 13 patients in the treatment group and 15 patients in the placebo group. Patients in the treatment group were given traditional Chinese herbal medicine in addition to the conventional treatment. Patients in the placebo group were given placebo in addition to the conventional treatment. Main outcome measures: The serum resistin levels on admission, and days 1, 3, 5, and 7 after the admission were detected. Results: The serum resistin levels on admission in all the patients were higher than normal level, and there was no significant difference between the two groups (P>0.05). On days 1, 3, 5, and 7 after admission, the resistin levels in the treatment group were (3.29+/-1.66) mu g/L, (3.71+/-1.05) mu g/L, (3.08+/-1.47) mu g/L and (3.62+/-1.67) mu g/L, and in the control group (5.16+/-1.93) mu g/L, (5.07+/-1.53) mu g/L, (4.88+/-1.47) mu g/L and (5.12+/-1.48) mu g/L, respectively. The resistin levels were lower in the treatment group than in the control group (P<0.05). Conclusion: Serum resistin level in SAP patients can be decreased by integrated traditional Chinese medicine and Western medicine therapy.

Objective: To investigate the clinical and pathological characteristics of cervical lymph node metastasis in papillary thyroid microcarcinoma (PTMC), and provide a basis for the individualized surgical procedure. Methods: Retrospectively analyzed the clinical data of 940 PTMC patients admitted to the Department of Thyroid Surgery, the First Affiliated Hospital of Zhengzhou University, from January 2016 to June 2018, including 206 males and 734 females, with a gender ratio of 1.0∶3.6. Age ranged from 18 to 78, with an average of (45.5±10.6) years. The correlation between gender, age, cancer size, multifocality, BRAF^V600E gene mutation, complicated with hashimoto′s thyroiditis, extrathyroidal extension and lymph node metastasis were analyzed. SPSS 21.0 software was used for statistical analysis. Chi-square test or rank sum test was adopted for comparison between groups, and logistic regression analysis was adopted for multivariate analysis. Results: There were 397 (42.2%) patients with central lymph node metastasis (CLNM) and 104 (11.1%) patients with lateral lymph node metastasis (LLNM). Univariate analysis showed that male, age < 55 years old (χ²=24.485, P<0.001), bilateral cancer foci (χ²=8.100, P=0.004), larger length-diameter (Z=-0.016, P<0.001), and BRAF^V600E gene mutation (χ²= 4.918, P=0.027) had a higher CLNM positive proportion, and LLNM positive proportion was higher in male (χ²=6.584, P=0.010), bilateral cancer foci (χ²=26.669, P<0.001), larger length-diameter (Z=-4.991, P<0.001), extra-glandular invasion (χ²=16.862, P<0.001) . Multivariate logistic regression analysis showed that gender (OR=2.091, P<0.001), age (OR=1.551, P=0.010), cancer lesion length (OR=5.285, P<0.001) and BRAF^V600E gene mutation (OR=1.648, P=0.038) were independent risk factors for CLNM in PTMC patients. Gender (OR=1.657, P=0.032), bilateral lesion (OR=2.610, P<0.001), tumor length diameter (OR=7.420, P<0.001) and extrathyroidal extension (OR=2.611, P=0.005) were independent risk factors for LLNM. The optimal critical values of tumor lesion length-diameter for risk assessment in CLNM and LLNM were 0.6 cm and 0.8 cm, respectively. Conclusions For PTMC patients with negative cervical lymph node had risk factors for lymph node metastasis, preventive dissection of central lymph nodes was recommended, and preventive dissection of lateral lymph nodes should also be comprehensively considered, by evaluating the extrathyroidal extension.