Objective To analyze the clinical typing, pathological classisfication, and prognosis of primary IgA nephropathy (IgAN).Methods Clinical typing, pathological classisfication and relationship between clinical manifestations and pathological features of 220 cases with IgAN were analyzed in 10 years.Results IgA nephropathy occupied 42.9％ (220/512) of all the patients received renal biopsy at the corresponding time.Asymptomatic abnormal urinalysis was the most common clinical manifestation(39.0％ (86/ 220)), followed by hypertension (17.7％ (39/220)) and recurrent macroscopic hematuria (15.4％ (34/220)).Grade Ⅲ pathological change(29.5％ (65/220)) was the most co mmon,followed by grade Ⅱ (27.3％ (60/ 220)) and grade Ⅳ (18.2％), Grade Ⅰ/Ⅴ were relatively less ((11.4％ (25/220), 13.6％ (30/220)).No correlation could be found between types of deposited immune complex and pathological lesion extent(x2=4.87, P＞0.05).The clinical manifestations were significantly correlated with the severity of glomerular lesions (x2 =13.14,P＜0.05).During the follow-up for 106 patients (mean duration of 23 months), 90 patients(84.9％) had normal renal function and 75 patients(70.8％) had decreased excretion of protein in urine (＜1 g/24 h).Conclusion The clinical typing of primary IgA is correlated with pathological changes.The prognosis of IgA is markedly correlation with the pathological lesion degree.Renal functions will be improved if the different treatments were given according to the different renal pathological features.

Objective To study MRI features of solid-pseudopapillary tumors of pancreas(SPTP).Methods MR findings of 3 patients with histopathologically proven SPTP were retrospectively analyzed.Results The mean diameter of these tumors was 4.5cm(3.5～8cm).One tumor was predominantly composed of cystic portions,2 tumors were composed of predominantly solid and some cystic portions.Fibrous septa was seen in cystic area in 1 case.One cystic tumor showed low signal intensities on T1WI and high singal intensities T2WI.The solid portions of mass showed moderate hypointensity on T1WI,and moderate hyperintensity on T2WI,and heterogeneous obvious enhancement on T1WI MRI in 2 cases.Conclusion There are some characteristics in MRI manifestation of SPTP.The disease might be correctly diagnosed combined with the clinical feature,and should be differentiated from nonfunctioning islet cell tumor,mucinous cystadenoma or cystcarcinoma of the pancreas,etc.

Objective:To detect periodontopathic bacterial DNA in atherosclerotic vascular lesions in a group of Chinese patients by using polymerase chain reaction(PCR) techniques.Methods: Ten human specimens of atherosclerotic plaque were obtained sterilely.The sclerotic lesions were blade into fine pieces and DNA was isolated from the samples.To detect Porphyromonas gingivalis(Pg),Tannerella forsythia(Tf),Aggregatibacter actinomycetemcomitans(Aa),Prevotella intermedia(Pi),Prevotella nigre-scens(Pn),Treponema denticola(Td),Campylobacter rectus(Cr),PCR amplification of bacterial 16S ribosomal DNA(rDNA) was carried out.Results: PCR assays for bacterial 16S rDNA indicated the presence of periodontal pathogens in 3 out of 10 surgical specimens.DNA of Pg were found in 3 samples,Tf was found only in one among the 3 samples and Pn was found in another sample among the 3 samples.Conclusion: The data confirm that DNA of periodontal pathogens present in atherosclerotic plaques.Pg,Tf,Pn may play a role in the development and progression of atherosclerosis in these Chinese patients.Further studies with large size samples are needed.

Objective To investigate the clinical value of MRI in the preoperative evaluation of breast cancer compared with mammography and ultrasonography. Methods A total of 35 patients with breast cancer were examined preoperatively with dynamic contrast enhanced MRI, mammography and ultrasonography. The findings were evaluated and compared with surgical biopsy. Results The detection rates of breast cancer with MRI, mammography and ultrasonography was 100%, 74.29% and 82.86%, respectively. MRI, mammographic and ultrasonographic measurement of tumor size had correlation coefficient to pathologic findings (r=0.94, 0.87, 0.70, respectively). The sensitivity, specificity, and accuracy of detection of intraductal spread of MRI, mammography and ultrasonography was 100%, 80.00% and 88.57% (P＜0.05), 66.67%, 95.00% and 82.86% (P＞0.05), 33.33%, 95.00% and 68.57% (P＞0.05), respectively. Conclusion MRI can detect breast cancer, especially intraductal spread more sensitively than mammography and ultrasonography.

BACKGROUND:Many studies have demonstrated that in order to achieve the endothelialization of the polymer materials, surface loading of bioactive factors is an important means and the introduction of human endothelial cells on the surface of the polymer materials wil contribute to increase the biocompatibility of materials. OBJECTIVE:To synthesize the polyethylene glycol hydrogel packaging vascular endothelial growth factor, basic fibroblast growth factor and endothelial progenitor cells, and to observe the sustained release of growth factors and culture status of endothelial progenitor cells. METHODS:The polyethylene glycol-modified hydrogel containing arginine-glycine-aspartic acid peptide was synthesized, and then, rat endothelial progenitor cells, basic fibroblast growth factor, vascular endothelial growth factor, matrix metal oproteinases were successively added. The hydrogel were immersed in PBS, and ELISA was used to test the levels of growth factors in supernatants every 12 hours. Matrix metal oproteinases-2 (100, 1 000 ng) and matrix metal oproteinases-9 (100, 1 000 ng) at different mass were added into the PBS containing hydrogel after 72 hours. ELISA was also used to test the levels of growth factors in supernatants every 12 hours. The hydrogel encapsulating endothelial progenitor cells was cultured in a culture medium for 5 days, and the number of survival cells was counted by a flow cytometer after digestion. RESULTS AND CONCLUSION:Within 12-72 hours, the release percentage of basic fibroblast growth factor and vascular endothelial growth factor remained at about 41%. After 72 hours, the release percentage of both growth factors was found to grow steadily when matrix metal oproteinases-2 (100, 1000 ng) and matrix metal oproteinases-9 (100, 1 000 ng) at different mass were added, which reached 95%. The release percentage was increased with the increasing mass of matrix metal oproteinases. After 5 days of culture, 88.17%cells stil survived in the hydrogel. These findings indicate that sel-assembly polyethylene glycol-modified hydrogel can realize the control ed release of basic fibroblast growth factor and vascular endothelial growth factor, and it can also support the proliferative growth of endothelial progenitor cells.

Objective To study the diagnostic value of the morphological changes to deep fascia in distinguishing between benign and malignant soft-tissue tumors in lower limbs using 3.0 T MRI. Methods MR images of 40 consecutive patients with 41 pathologically proven soft-tissue tumors of the lower limbs were retrospectively reviewed by two radiologists. Lesions were divided into four groups according to their predominant location with respect to the deep fascia: (1)Subcutaneous lesions superficial to the deep fascia (n=7). (2) Lesions located beneath the deep fascia (n=8). (3) Lesions in the interspaces of the deep fascia investment (n=10). (4) Intramuscular lesions (n=16). The relationship between tumors and the deep fascia and the morphology changes of deep fascia were analyzed. Lesions of groups (1) (2) were considered as superficial lesions, while lesions of group (3) (4) were considered as deeper lesions. The size differences between those had intact deep fascia and those had destructed deep fascia in superficial lesions and in deeper lesions were evaluated by using Mann-Whitney U test, respectively. P values < 0. 05 were considered statistically significant. Results The deep fascial structures were intact in all of the 16 pathologically proven benign lesions. In 23 of the 25 malignant lesions, there was destruction of the deep fascia with the signs of displacement/disruption of the deep fascia and penetrating growth in (1) (2), and displacement/distruption of intermuscular septum as well as involvement of interspaces of the deep fascial investment and loss of integrity of the fascial/muscular planes in (3) (4). Only 2 malignant lesions demonstrate intact deep fascia. In superficial lesions [(1) (2)] , the maximum size were (5.0±3.8) cm (Median ± Interquartile Range) in those had intact deep fascia, and (5.7±6.90) cm in those had destruction signs (T=47.5, P >0.05). In deeper lesions [(3) (4)] the maximum size were (4.6±1.9) cm of those had intact deep fascia, and (13.6±6.5) cm of those had destruction signs (T= 62.5, P <0.01). Distinguish malignant from benign lesions on the signs of destructed deep fascia, the sensitivity, specificity and accuracy were 92.0% (23/25), 100% (16/16), and 95. 1% (39/,41), respectively. Conclusions Tumor involvements and disruption of the deep fascial structures visualized by 3.0 T MR imaging may be of utility in differentiating malignant from benign soft-tissue tumors.

Objective To study the preservative indices of stored platelet and verify the effect of a new platelet incubator made in China. Methods 12 bags of fresh platelet rich plasma (PRP) were collected. Each bag was equally divided into 2.One bag was stored for 5 days in XHZ-IA platelet incubator which was made in China, and the other bag stored in FORMA-3606 platelet incubator made in USA. Some preservative indices of stored platelet e.g. aggregation rate, recovery rate after response to hypotonic shock, CD62p expression rate etc. were tested daily. Results There were no significant differences in these preservative indices between platelets stored in two platelet incubatorshas. Conclusion XHZ-IA platelet incubator has the same effect on PRP preservation as FORMA-3606 platelet incubator.

Objective To analyze the pathogenic distribution and drug resistance of 7 534 clinical samples ,so as to provide a ba-sis for rational use of antimicrobial drugs in clinical .Methods The pathogens isolated from 7 534 clinical samples were counted and their drug resistance rates were analyzed by retrospective survey method .Results The positive rates of Gram positive coccus ,Gram negative bacillus and fungi were 14 .02% ,52 .98% ,and 7 .57% respectively .The drug resistance rates of pathogens were increas-ing .Conclusion Improving the accuracy of detection and standardizing the application of antibacterials would be helpful to reduce the generation of bacterial drug resistance .

Objective To explore the value of diffusion weighted imaging(DWI) in the diagnosis of invasive ductal carcinoma not otherwise specified and find a suitable diagnostic cutoff ADC value.Methods The MRI findings of 69 patients (69 lesions) of invasive ductal carcinoma not otherwise specified and 67 patients benign tumors (69 lesions) confirmed by pathology were evaluated.ADC values of the carcinoma,benign tumors and their contralateral normal breast tissues were obtained.Independent-samples t test and ROC curves were used.Results The ADC values of carcinoma and contralateral normal breast tissues were (0.925 ± 0.268) × 10-3 mm2/s and (1.680 ± 0.446) × 10-3 mm2/s respectively,their difference had statistical significance (t =12.08,P ＜ 0.01) ; The ADC values of benign tumor and contralateral normal breast tissues were (1.350 ± 0.383) × 10-3 mm2/s and (1.690± 0.356) × 10-3 mm2/s respectively,the difference had statistical significance (t =6.64,P ＜ 0.01); The difference between carcinoma and benign tumors had statistical significance as well (t =7.56,P ＜ 0.01).The area under the ROC curve of carcinoma and contralateral normal breast tissues,benign tumors and contralateral normal breast tissues,carcinoma and benign tumors were 0.915,0.794,0.847 respectively.The diagnostic cutoff value for each were 1.185 × 10-3 mm2/s,1.505 × 10-3 mm2/s,1.015 × 10-3 mm2/s respectively;Corresponding sensitivity and specificity were 89.9％ and 85.5％,79.7％ and 63.5％,75.4％ and 87.0％respectively.Conclusions MR-DWI is valuable in the diagnosis of invasive ductal carcinoma not otherwise specified.The best ADC diagnostic cutoff value to differentiate invasive ductal carcinoma not otherwise specified from benign tumors is 1.015 × 10-3mm2/s.

Objective To investigate the value of DWI before treatment on predicting sensitivity of concurrent chemoradiation in nasopharyngeal carcinoma.Methods Seventy patients with nasopharyngeal carcinoma proved by nasopharyngoscope and biopsy pathology conducted DWI before concurrent chemoradiation and reexamined on receiving dose of 50 Gy.The mean, maximum and minimum ADC value of tumor were measured on DWI and maximum area of tumor before and during treatment ( on dose of 50 Gy) was delineated to calculate the tumor regression rate ( RS0-50 ).The patients were classified into three groups according to the RS0-50 as sensitive, moderate, and resistant therapeutic effect.Patients were classified into different groups according to the pathologic type and clinical stage respectively .Spearman correlation analysis was used between RS 0-50 and ADC values of all tumors , different pathologic types and clinical stages , respectively.ROC was used to evaluate the cutoff and value of ADC which had highest correlation to RS0-50 on predicting therapeutic effect.Results DWI of 3 patients were excluded due to obvious swallow artifact which influenced the measurement , and finally 67 patients were included in this study, with pathological type of nonkeratinized differentiated undifferentiated carcinoma in 49 cases, nonkeratinized undifferentiated carcinoma in 18 cases, clinical T1 stage in 7 cases, T2 in 14 cases, T3 in 17 cases and T4 in 29 cases.During treatment , there were 13 cases with sensitive therapeutic effect , 42 cases with moderate therapeutic effect and 12 cases with resistant therapeutic effect.RS0-50 [ ( 65.6 ± 3.1) %] showed mildly and moderately negative correlation to mean ADC [(1.06 ±0.19) ×10 -3 mm2/s] and maximum ADC [(1.29 ±0.33) ×10 -3 mm2/s] respectively ( r =-0.276, P =0.024 and r =-0.434, P=0.001, respectively).ROC showed when setting threshold at maximum ADC value of lower than 1.06 ×10 -3 mm2/s for predicting sensitive therapeutic effect , the specificity , sensitivity , and accuracy was 69.2%(9/13), 88.9%(48/54) and 85.1% (57/67), respectively, and when setting threshold at maximum ADC value of higher than and equal to 1.30 ×10 -3 mm2/s for predicting resistant therapeutic effect, the specificity, sensitivity, and accuracy was 75.0% (9/12), 65.5% (36/55) and 67.2%(45/67), respectively.Conclusion Pretreatment maximum ADC value were able to predict the tumor regression rate and sensitivity of concurrent chemoradiation in nasopharyngeal carcinoma .