Thymoma is a rare tumor with little evidence available to guide its treatment. A few systematic reviews of the literature have been performed in recent years and the following treatment recommendations have been developed. For early stage patients, complete resection of the entire thymus should be performed without post-operative chemotherapy and radiation therapy;however, for high-risk tumors, adjuvant radiation should be considered to reduce recurrence. For locally advanced patients, surgery combined with pre- or post-operative chemoradiotherapy are recommended.

The research of urologic reconstruction with tissue engineering techniques has been carried out for a couple of years.However,the clinical application is impeded by the difficulties in drawing materials and lack of sufficient cells for seeding.The stem cells have the ability of self-renewal and differentiating into desired cell lines,which also have the advantage of less invasive to be harvested,provide new opportunities for further research.Mesenchymal stem cells(MSCs) have been used in the autologous augmentation cystoplasty in recent years,and bone marrow derived mesenchymal stem cells can undergo directed differentiation toward to endodermal derived urothelium in the appropriate signaling environment.The stem cells were supposed to differentiate in urethral tissue like cells in bladder tissue according to the similar inner environment.Transurethral ultrasound(TUUS)-guided injections of autologous myoblasts and fibroblasts is an effective and minimally invasive treatment modality to treat stress urinary incontinence.In addition,eNOS-transduced syngeneic MSCs can improve erectile function through accelerating eNOS expression and improving endothelial-derived NO biosynthesis.

The production of mature functional T cells requires many signals from the thymus such as Wnt,Notch and Hedgehog,et al.The Hedgehog protein family signals for development,patterning and organogenesis of many tissues during mammalian embryogenesis.In recent years,more and more research groups focus their attention on it because of its relationship between tumors.Abnormal differentiation and development of T cells may cause various immunological diseases and tumors.Illuminating the roles of Hedgehog signaling in T cell differentiation and development can provide a theoretical guide in the treatment of tumor.

Objective To discuss the relationship between lung function before and after radiotherapy and radiation-induced pneumonitis in locally advanced non-small-cell lung cancer.Methods 76 patients were evaluated by pulmonary function tests before radiotherapy and in 1 month and 3 month after radiotherapy respectively.Results All patients were treated radiotherapy with irradiation dose of 60-70 Gy,the radiation pneumonitis occurred in 26 patients (group A),22 patients were grade 1,3 patients were grade 2,1 patient grade 3 and no patient was grade 4 and 5.50 patients without radiation pneumonitis were group B.There were significant difference between group A and group B for FEV1 before radiotherapy [(51.67±19.03) ％,(69.03± 14.54) ％,t =2.34,P ＜ 0.05].There were no significant difference between in 1 month and 3 months after radiotherapy for FVC (P ＞ 0.05).There was significant difference between in 1 month and 3 months after radiotherapy for DLCO (group A,P ＜ 0.01; group B,P ＜ 0.05).Conclusions For locally advanced non-small-cell lung cancer patients,the lower of FEV1 before radiotherapy inclineds to develop radiation pneumonitis,DLCO levels are lower significantly in patients prones to radiation pneumonitis.FEV1 and DLCO are sensitive indicators to predict radiation pneumonitis.

Objective To compare the dosimetric differences between pencil beam convolution (PBC) and anisotropic analytical algorithm (AAA) in Eclipse treatment planning system for intensitymodulated radiotherapy (IMRT) planning of lung cancer patients and dosimetric verification.Methods 10 IMRT plans of lung cancer patients were calculated using the PBC and AAA and the differences of dosimetric parameter were analyzed according to dose-volume histogram of planning target volume (PTV),lung and spinal cord.The verification measurements were performed on an inhomogeneous thorax phantom using a pinpoint ionization chamber.The agreement between calculated and measured doses was determined.The paired t test was used to compare the results.Results Compared with PBC,the AAA predicted higher maximum PTV dose (t =-4.03,P =0.010),lower minimum PTV dose (t =5.09,P =0.040),and a reduction of the volume of PTV covered by the prescribed dose.The AAA also predicted slightly increases than the PBC algorithm in the mean dose to the lung and the V20 as well as the maximum dose to the spinal cord,and the differences were statistically significant (t =-3.99,-2.79,-5.46,P =0.010,0.038,0.003).In the verification measurements,the agreement between the AAA and measurement was within 2％and superior to the PBC algorithm on isocenter (t =-3.82,P =0.012).Conclusions For IMRT treatment planning of lung cancer,the PBC algorithm overestimates the dose to the PTV and underestimates the dose to the lung and the spinal cord,so the AAA for treating planning in which the tissue inhomogeneous such as lung is present is recommended.

Objectives To explore the correlation between the population characteristics of sero-reactivity with quantitative antibody based-IHA and the transmission parameters,such as epidemic situation,transmission status or infection trend in population.Methods The residents in one endemic administrative village were simultaneously examined by Kato-Katz technique for parasitological stool examination,as well as by immuno-diagnostic technique IHA for detection of IgG antibody against soluble egg antigen for two consecutive years.The results of examination were analyzed and compared on the diagnostic parameters of IHA,the correlation of the changes of positive rates and antibody levels of IHA with the changes of infection trend in population and the distribution of antibody levels between 'the true negative' and 'the true positive'.Results When Kato-Katz technique based on 2 stool samples,each read in 3 thick smears,was used as the reference,the overall sensitivity of IHA was high (from 77.27% to 85.48%) with a relatively poor specificity of lower than 60%,the negative predict value (NPV) was excellent of higher than 94%.The specificity of IHA decreased with the increase of the age in different age-groups of population,showing the highest among the younger less than 15 years old.The distribution trends of positive rates of antibody in different age groups by IHA showed similar to that of egg positive rate detected by Kato-Katz although the positive rates of IHA were higher than these by Kato-Katz,which showed that a higher false positive (from 41.90% to 44.56%) and a certain false negative (from 14.52% to 22.73%)existed in IHA.The positive rate of antibody decreased slowly among the individuals with S.japonicum infection,who received treatment.There was an overlap in the distribution of antibody levels between ' the true negative' and ' the true positive'.Conclusions Under the current schistosomiasis epidemic situation in China,IHA is valuable in the epidemiologic surveys.It should be of further deliberation applying IHA as the screening approaches for identification of target individuals for treatment or determination of the infection rate in community and IHA needs to be combined with the parasitological examination.

Aim To investigate the effects of U50,488H(a selective ?-opioid receptor agonist)on ventricular arrhythmias induced by myocardial ischemia and reperfusion in rats and to elucidate their mechanisms.Methods The contents of CK(creatine phosphokinase)and LDH(lactate dehydrogenase)were measured; The isolated heart was perfused using langendorff equipment. Heart rate(HR), arterial blood pressure(ABP), left ventricular pressure (LVP), cardiac function (?dp/dtmax), rate of ventricular tachycardia(VT)and ventricular fibrillation(VF)were examined in rats in vitro. The incidence of ventricular arrhythmias and arrhythmia score were also determined; The change of sodium currents (INa) induced by U50,488H was detected by whole-cell recording mode using patch clamp.Results ① In comparison with I/R group, the contents of CK、LDH in plasma of rats in U50,488H+I/R group were significantly lowered(P

Objective To investigate the clinical and pathological features and prognostic factors for thymoma with myasthenia gravis (MG).Methods The clinical and pathological data of 126 patients with thymoma and MG confirmed by postoperative pathological examination from 2008 to 2014 were analyzed retrospectively.The Kaplan-Meier method was used to calculate survival rates;the log-rank test was applied for univariate prognostic analysis;the Cox regression model was applied for multivariate prognostic analysis.Results The numbers of patients who received the follow-up visits at 3 and 5 years were 88 and 45,respectively (the patients who were admitted before the end of October 2011 and the end of October 2009).The 3-and 5-year survival rates were 97.9％ and 91.8％,respectively.The 3-and 5-year survival rates for patients with WHO types A+AB+B1 +B2 and B3 were 98.6％/95.2％ and 90.6％/92.9％,respectively (P=0.764),and those for patients with Masaoka stages Ⅰ-Ⅱ and Ⅲ-Ⅳ were 98.6％/95.2％ and 97.4％/72.7％,respectively (P=0.791).The 3-and 5-year survival rates for patients with complete and partial resection were 97.8％/91.7％ and 100.0％/50.0％,respectively (P=0.964),and those for patients with complete resection alone and complete resection+postoperative radiotherapy were 96.8％/93.1％ and 100.0％/94.7％,respectively (P=1.000).Conclusions The major treatment modality for thymoma with MG is complete resection followed by radiotherapy according to the specific circumstances after surgery.Complete resection,postoperative radiotherapy,WHO type,and Masaoka stage may be associated with prognosis.

Objective:To compare the dosimetric differences of the planning target volume(PTV)and the organs at risk(OAR)for postoperative patients with cervical cancer on intensity-modulated radiotherapy(IMRT)and conventional 4 fields(4F)or 2 fields(2F)radiotherapy.Methods:Six postoperative patients with cervical cancer were chosen randomly.The next steps were CT scan,PTV and OAR contouring.The treatment protocols were designed into conventional 4F,2F and IMRT by TPS.Finally,the doso distribution and DVH were compared.Results:About the conformability of PTV,IMRT showed a significantly superior dose distribution over conventional 4F(P=0.015),and conventional 4F was superior to 2F(P=0.043).IMRT as compared with conventional 4F or 2F protocols,the received dose of the 50%volume of bladder was reduced by 25.8%and 27.5%,the rectum was reduced by 12%and 14.3%,the small intestine was reduced by 36.5%and 50%.But the differences of the femoral head(left & right)and the ilium have no statistical significance.Conclusion:in postoperative radiotherapy for cervical cancer,IMRT have Inore dosimetric advantages than conventional radiotherapy.

Objective To explore the impact and change regularity of Oncomelania hupensis snails and vegetation in the marshlands of Poyang Lake caused by the impoundment of the Three Gorges Project. Methods By using the methods of stratified systematic sampling and pinpoint navigation,the succession of vegetation was observed and the distribution of O. hupensis snails was investigated in a period of 8 years on 4 typical marshlands in Poyang Lake. The regularity of changes in vegetation and O. hu-pensis snails was analyzed on the marshlands at high,medium and low elevations,respectively. Results After the impoundment of Three Gorges Project,the average flooding days of these 4 marshlands in 2004 and in 2008 were reduced of 74.8 and 65.8 days compared with those in 2002,the year just before the impoundment of the project,respectively. The change of spatial distribution pattern and the succession of dominant species of vegetation on the marshlands of Poyang Lake have taken place since 2005,and several vegetations showed a trend of moving toward the center of the lake. The hygrophilous vegetation has degenerated and gradu-ally been replaced by mesophily meadow in the marshland area above 14 m elevation. Carex,Phalaris arundinacea and Polygo-num appeared in large area and expanded slowly towards the center of the lake on the marshland below 14 m elevation. O. hupensis snails were mostly found under the Carex association. The tendency of decreasing in density of snails and of migration of snail habi-tats towards low terrain was observed. Conclusions The impoundment of Three Gorges Project has had a significant impact on hy-drological regimes,and a new succession of vegetation has taken place in the marshlands of Poyang Lake. O. hupensis snails and the mesophily vegetation show a trend of migrating slowly to the areas of low elevation in the marshlands.