Objective To evaluate endoscopic ultrasonography (EUS) in preoperative staging of gastric carcinoma,and to study the molecular biologic basis of its ultrasonic manifestation.Methods Sev-enty-four patients with gastric carcinoma were referred to EUS and staged preoperatively.The staging esults of EUS were compared with the histopathological staging and the expression of PTEN.Results The verall accuracy rate of EUS for determination of T staging was 82.4%(61/74),for T1,T2,T3 and T4 were 100.0%,72.7％,85.O％ and 78.9％,respectively.For N staging,EUS had the overall accuracy rate of 74.3%(55/74),with sensitivity and specificity of 80.8％ and 59.1％,respectively.The preoperative EUS for T and N staging of gastric carcinoma was of inverse correlation with the expression of PTEN.Conclusions EUS is an accurate staging modality in determining carcinoma invasive depth and lymph node involved,with a few exceptions of overstaging and understaging.However,EUS criteria to differentiate benign from malignant nodes still need to be further defined by future studies.The preoperative EUS for T and N staging could well display the molecular pathologic basis of gastric carcinoma.

Objective To study the toxicity and mechanism of fullerene(C_(60))on human embryo liver L-02 cells.Methods L-02 cells were exposed to C_(60)suspension of different concentrations(0.00,1.25,2.50,5.00,10.00,20.00 and 40.00?g/ml)for 24 h,then the content of GSH and the activity of LDH,SOD were determined,the viability of cells with/without NAC was also compared.Results Compared to the control group,the viability of cells exposed to 1.25,2.50,5.00,10.00,20.00 and 40.00?g/ml C_(60)suspension decreased in a dose-dependent manner,and the differences were significant(P

China has entered an aging society,fall in the elderly often causes their physical and mental damage and even be life-threatening.Literature reviews studying on fall prevention in the elderly discovered that the improvement of the lower-extremity muscle strength can reduce the fall incidence in the elderly.This paper summarized the current researches on the methods for elderly people's lower-extremity muscle strength improvement.In addition,this paper also gave an analysis of both advantages and disadvantages of these methods,in order to provide a theoretical evidence and reference for the future study in improving the lower-extremity muscle strength.

Objective? To analyze hot research areas of nutrition support for cancer patients from 2008 to 2017, so as to provide guidance for the development of researchin nutrition support for the cancer patients in our country. Methods? Databases including CNKI, Wanfang, and VIP were searched with the subject or key words of "tumor""cancer""nutrition support/nutritional support", and databases including PubMed, Web of Science were searched with the subject or keywords of "cancer""tumor""malignant tumor"and"nutrition support/nutritional support" to review the relevant literature published from 2008 to 2017. Softwares including BICOMB 2.0 and SPSS 23.0 were used to generate high-frequency keywords, and construct cluster analysis. Results A total of 889 articles were retrieved and the number of articles showed an increasing trend on the whole. There were 69 core authors with≥3 published articles, and 62 high frequency subject words with word frequency ≥21 times. Cluster analysis showed that the research mainly focused on four fields: perioperative nursing of gastrointestinal cancer patients; nutritional risk screening and prognostic factors in gastrointestinal cancer patients; nutritional status and quality of life of patients treated with chemotherapy/radiotherapy;nutritional assessment and intervention for malignant oncology patients. Conclusions? The concept of tumor nutrition has been gradually developed, but there is still great room for development in the future in terms of the depth and breadth of research, early identification of patients with nutritional risk, nutritional assessment, formulation of feasible nutritional intervention programs and measures to improve the prognosis of patients and their quality of life.