Objective To explore the imaging and pathological characteristics of the telangiectatic osteosarcoma.Methods The clinical,imaging and pathological data of telangiectatic osteosareoma in 12 cases were analysed.Results The tumors often located at the diaphysialepiphysial of the os longum and most of them were occured at the lower limb,increasing of the alkaline phosphatase(AKP) was rare.X-ray and CT character istics were osteoclastic and expensive bony destruction;there were multiple small cystic formation and fluid-fluid level in the destructive region and soft masess;the cortex of the bone became thinner with multiple sieve type destruction;the periosteal reaction and radial bone spicule were often seen.Pathological characteristics were of typical tumor cell of the osteosarcoma,mutliple sinus of the blood and "color bland shape" component.Conclusion The telangiectatic osteosarcoma has certain specific clinical,imaging and histologyical characteristics.

Objective To investigate the effects of nuclear factor κB(NF-κB) antisense oligodeoxynucleotides (AS-ODNs) on transforming growth factor β1 (TGF-β1)-induced epithelial mesenchymal transition (EMT) in human renal tubular epithelial cells. Methods NF-κB AS-ODNs were transferred into the human renal tubular epithelial cells (HK-2), and the cells were stimulated by 10 μg/L TGF-β1 for 24 hours. The expression of NF-κB mRNA and α-SMA mRNA were measured by RT-PCR. α-SMA protein expression was assessed by fluorescence spectrum.Results TGF-β1 significantly up-regulated the expression of NF-κB mRNA, which was 8 folds of blank control (P<0.01). TGF-β1-indueed epithelial mesenchymal transition was inhibited by NF-kB AS-ODN and the NF-KB mRNA expression of AS-ODNs was decreased by 75%(P<0.05).The expression of α-SMA mRNA and protein was also down-regulated obviously (P<0.05).Conclusion NF-κB AS-ODN can inhibit the expression of NF-κB and the epithelial-mesenchymal transition, which may be a new therapeutic strategy against tubulointerstitial fibrosis.

Objective To investigate the characteristics and risk factors of anemia in renal transplant recipients over 60 years old.Methods Clinical data of one hundred and sixty-eight renal transplant recipients over 60 years old were retrospectively analyzed.Logistic regression analysis was used to determine the risk factors of anemia.Results In 168 cases of renal transplant recipients,the incidence of anemia was 45.2％(76/168).Forty cases were normocyte and normochromic,26 cases were microcytic hypochromic,10 cases were hemolytic anemia.In these anemic recipients,51 cases were short of erythropoietin (EPO),25 were EPO resistance.The incidence of malnutrition and cardia-cerebrovascular complication was higher in recipients with anemia than those without anemia (P＜0.01).The incidence of anemia in CsA+Aza+Pred treatment was 57.1％,which was significantly higher as compared to other three treatments (P＜0.01).Unconditional multivariate Logistic regression analysis revealed that male,creatinine level,acute reject reaction,delayed graft function (DGF) were the independent predictors of anemia,the corresponding OR values were 1.089,5.156,6.345,1.876.Conclusions Anemia is a common and serious complication in renal transplant recipients over 60 years old.Male,creatinine level,acute reject reaction,DGF are the independent risk factors of anemia in renal transplant recipients over 60 years old.

Objective To investigate the incidence and risk factors of acute kidney injury (AKI) after craniocerebral injury.Methods A single cohort of 791 patients who suffered from craniocerebral injury from January 2008 to January 2010 in the Second Hospital of Lanzhou University were prospectively analyzed.Craniocerebral injury was defined according to definite medical history of craniocerebral injury,the verification of CT and Glasgow coma scale (GCS) score.AKI was defined as a relative 50％ increase or an absolute increment of 26.4 μmol/L in Scr within 48 hours and/or urine volume ＜0.5 ml·kg-1·h-1 up to 6 h.Multivariate Logistic regression analysis was used to evaluate possible risk factors associated with post-craniocerebral injury AKI.Results Of the 791 patients,the incidence of AKI was 39.4％.In hospital mortality of AKI patients was 27.9％,which was 5.065 times of non-AKI patients (P＜0.01).The incidence of AKI in patients with lower GCS score (≤8 score,heavy group)was 69.7％,which was significantly higher as compared to moderate and mild groups (P＜0.01).Unconditional multivariate Logistic regression analysis revealed that lower GCS score (≤ 8 score),hypotension (systolic pressure＜90 mm Hg),elderly and male were the independent predictors of AKI episodes,the corresponding OR values were 2.932,2.176,1.789,1.544 respectively.Conclusions AKI is a common complication after craniocerebral injury.Lower GCS score,hypotension,elderly and male are the independent risk factors of AKI in patients after craniocerebral injury.

Objective: Effective prevention and control measures are essential to contain outbreaks of infectious diseases, such as coronavirus disease (COVID-19). Understanding the characteristics of case clusters can contribute to determining which prevention and control measures are needed. This study describes the characteristics of COVID-19 case clusters in Malaysia, the method used to detect a cluster’s index case and the mode of early transmission, using the seven cluster categories applied in Malaysia. Methods: This cross-sectional study collected publicly available data on COVID-19 clusters occurring in Malaysia from 1 March 2020 to 31 May 2021. The characteristics of cases were described by category, and their associations with several outcomes were analysed. Descriptive analyses were performed to explore the method used to detect the index case and the mode of early transmission, according to cluster category. Results: A total of 2188 clusters were identified. The workplace cluster category had the largest proportion of clusters (51.5%, 1126/2188 clusters), while the custodial settings category had the largest median cluster size (178 cases per cluster) and longest median duration of cluster (51 days). The high-risk groups category had the highest mortality. There were significant differences in cluster size, duration and rate of detection across the categories. Targeted screening was most commonly used to detect index cases, especially in custodial settings, and in imported and workplace clusters. Household–social and social–workplace contacts were the most common modes of early transmission across most categories. Discussion: Targeted screening might effectively reduce the size and duration of COVID-19 clusters. Measures to prevent and control COVID-19 outbreaks should be continually adjusted based on ongoing assessments of the unique context of each cluster.