Recently,much interest has been focused on the clinical application and biology of tumor-derived DNA in the plasma/serum of cancer patients.Such interest has resulted in the demonstration of human papillomavirus(HPV) DNA in the plasma/serum of patients with cervical cancer(CC).The studies used different materials(plasma /serum),different DNA extraction methods and different primers to detect circulating free HPV DNA,so the positive rates varied from(6.9%) to 50%.The HPV DNA in the plasma/serum of patients suffering from CC most likely originates from the tumor itself,which will probably provide us with a new tool for CC monitoring after primary treatment,especially in patients in advanced stages.It is expected that this promising molecular tumor marker would soon be put into routine clinical use.

The main factors which affect the farmers'participation in the new rural cooperative medical service are the problems,which exist in the system of the rural cooperative medical service,the institutions of medical service,the government and the farmers themselves etc.Only by constituting the corresponsive policy measures according to these factors can the farmers actively participate in the new rural cooperative medical service.

Objective:To explore the infuence of calf spleen extractive injection combined with chemotherapy on immune function of the patients after colorectal carcinoma. Methods:Totally 128 cases of postoperative colorectal carcinoma patients were randomly di-vided into two groups with 64 ones in each. The control group only received FOLFOX 4 regimen, while the study group received calf spleen extractive injection additionally from the first day to the tenth day, 10ml, ivd, and 14-day was one cycle. After 4 weeks, im-mune function, peripheral blood leukocytes ( WBC) , hemoglobin ( Hb) and platelet ( Plt) in the two groups were compared, and the adverse reactions were evaluated as well. Results: After the treatment, CD3 +, CD4 +, CD8 + and CD4/CD8 were increased in the study groups, and those in the study group were much higher than those in the control group (P<0. 05). After the treatment, there were no significant changes in WBC, Plt and Hb in the two groups (P>0. 05), while WBC and Plt in the study group were higher than those in the control group (P<0. 05). The incidence of adverse reactions in the study group was lower than that in the control group (P<0. 05). Conclusion:Calf spleen extractive injection combined with chemotherapy not only can increase the immune func-tion, but also alleviate myelosuppression and gastrointestinal toxicity in the treatment of postoperative colorectal carcinoma patients.

Objective:To distinguish lung adenocarcinoma (ADC) from squamous cell carcinoma (SCC) using 18F-fluorodeoxyglucose (FDG) PET-based radiomic features. Methods:A retrospective analysis was performed in 182 patients (109 males, 73 females, age (59.0±8.3) years) with non-small cell lung cancer (NSCLC) who underwent 18F-FDG PET/CT scan between January 2018 and December 2019 in Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology. All patients had been diagnosed pathologically with lung ADC or SCC. The patients were divided into a training set ( n=91) and a validation set ( n=91) using simple random sampling method. Radiomic features were extracted from the PET images of segmented tumors using the Python package. The minimum redundancy maximum relevance feature selection algorithm and least absolute shrinkage and selection operator were employed to select informative and non-redundant features, and a radiomics signature score (rad-score) was developed. Differences of rad-score between groups were compared by Mann-Whitney U test. Multivariate logistic regression was applied to select the important factors. A combined model was constructed based on the clinical variable and radiomics signature. The predictive performance of models was analyzed and compared using receiver operating characteristic (ROC) curves and Delong test. Results:Four radiomic features, namely HHL_first order_maximum, LHL_first order_entropy, HHH_ gray level dependence matrix_large dependence high gray level emphasis (GLDM_LDHGLE), HHL_GLDM_LDHGLE (H/L represent the high/low pass filter) were selected to build the rad-score. The rad-score showed a significant ability to discriminate between different histological subtypes in the two sets(training set: -1.30(-1.70, -1.04) vs -0.60 (-1.11, 0.20), z=-4.61, P<0.001); validation set: -1.31(-1.66, -0.96) vs -0.73(-1.02, -0.24), z=-4.76, P<0.001). The area under the curve (AUC) of the rad-score were equal to 0.815 (95% CI: 0.723-0.906) in the training set, and 0.813 (95% CI: 0.726-0.901) in the validation set, respectively, which were larger than those of the clinical variables (smoking had the best prediction performance, training set: 0.721 (95% CI: 0.617-0.810), validation set: 0.726 (95% CI: 0.623-0.814)), however, the difference was not significant ( z values: 1.319, 1.324, both P>0.05). When the clinical variable (smoking) and radiomics signature were combined, the complex model showed a better performance in the classification of histological subtypes, with the AUC increased to 0.862 (95% CI: 0.785-0.940; sensitivity: 88.00%(22/25), specificity: 72.73%(48/66)) in the training set and 0.854 (95% CI: 0.776-0.933; sensitivity: 75.00%(21/28), specificity: 84.13%(53/63)) in the validation set. The AUC values were significantly higher than those of the clinical variable (smoking; training set: z=3.257, P<0.001; validation set: z=3.872, P<0.001). Conclusion:Individualized diagnosis model incorporating with smoking and radiomics signature can help differentiate lung cancer subtypes in a non-invasive, repeatable modality.

Medical integration is an inevitable trend of medical development and medical educa-tion reform nowadays. Under the guidance of integration,medical colleges at home and abroad develop a series of exploration and practice of medical education reform. According to difficulties and problems of medical education reform,this article put forward:changing ideas to adapt to the transformation of medi-cal model,combining medical education reform and new medical reform,playing the main role of educa-tion administration department in the reform of medical course system,strengthening multi-dimensional integration of medical science.

Objective　To summarize the experience in diagnosis and treatment of rare type of hepatic benign tumor and tumor-like lesions.Methods　The clinical data of 58 cases of uncommon benign hepatic tumor and tumor-like lesions admitted to Changhai Hospital from January 1980 to June 2000 were retrospectively reviewed. Results　Of the 58 cases, 26 were inflammatory pseudotumors, 8 focal hyperplastic lesions, 7 hepatocellular adenomas, 7 lipomatous tumors, 5 cystadenomas, 3 tuberculosis, 1 harmatoma and 1 neurofibroma. 82.8% of the cases had symptoms, 17.2% without obvious symptoms. Single lesion was found in 93.1%, multiple lesions in 6.9%. Operative procedures as follows: 30 local resections of the lesion, 14 hepatic segmentectomies, 9 hepatic lobectomies, 2 hepatic artery ligations, 1 hepatic artery ligation plus drainage of cyst, 2 liver biopsies. No operative mortality and no serious morbidity were noted. Conclusions　With popularization of advanced imaging techniques, the incidences of the benign tumor and tumor-like lesions of the liver have been increased in recent years. However, current imaging studies lack specificity, and differential dignosis of these lesions remains difficult. So we should be familiar with the clinical behavior, presentation of imagings and management of the diseases mentioned above.

Objective To investigate the effect of curcumin on chronic pancreatitis in rat.Methods Eighteen one-month old male SD rats were randomly divided into control group,ANP group and curcumin group with 6 rats in each group.After fed by 25％ alcohol for twelve weeks,the rats in ANP group were intraperitoneally injected with lipopolysaccharides ( LPS,2 mg/kg body weight) once a week for 4 weeks.The rats in curcumin group were fed with curcumin when they were intraperitoneally injected with lipopolysaccharides.Seventeen weeks later,the rats were sacrificed.Serum glucose was measured,pancreatic morphology was routinely examined,collagen deposition was determined by Masson stain,and the amylase and lipase in pancreatic tissue were evaluated,TGF-β1 mRNA was determined by using RT-PCR.Results The pathological score of control group,ANP group and curcumin group was 1.17 ±0.41,7.33 ±2.58 and 3.50 ± 1.05,and the score in curcumin group was lower than that of ANP group (P ＜ 0.01 ),but which was higher than that in control group (P ＜ 0.05 ).There was no difference in the serum glucose among the groups.The levels of amylase and lipase in pancreatic tissue were (7348 ± 102 ),( 14135 ± 1272) U/g,which were significantly higher than those in ANP group[( 5428 ± 547 ) and (9123 ± 1250 ) U/g,P ＜ 0.05].The expressions of TGF β1 mRNA in control group,ANP group and curcumin group were 0.618 ± 0.019,0.818 ±0.012,0.745 ±0.088,and the values in ANP group were significantly higher than those in control group and curcumin group (P ＜ 0.01 ).Conclusions On the basis of long term ethanol intake,repeatedly intraperitoneal injection of LPS can induce chronic pancreatitis,and curcumin has anti-fibrosis effect possibly by its inhibitory effect on the expression of TGF-β1.

Objective To explore the effects of music intervention on growth and development of premature infants. Methods 112 premature infants were randomly divided into the observation group and the control group with 56 cases in each. The control group received conventional nursing measures, and the observation group was simultaneously given music intervention besides the conventional routine nursing measures. Weight increase, hospitalization time, milk-intake volume and feeding tolerance were compared between the two groups. Results The weight increase in the observation group was higher than that in the control group. Hospitalization time and rate of feeding intolerance for the observation group was lower compared with that of the control group. The premature infants in the observation group took in more milk than those in the control group. Conclusions Music intervention can elevate feeding tolerance, facilitate nutrition and increase weight of premature infant, so it is beneficial to the growth and development of premature infant.

Objective To evaluate the therapeutic effect of pedical conjunctival flap transposition on refractory corneal ulcer. Methods The data of 56 eyes of 56 patients with refractory corneal ulcer who underwent pedical conjuctival transposition in a tertiary eye unit in China from June 2005 to June 2009 were retrospectively analyzed. There were 36 infective corneal ulcers, 9 keratoplasty graft ulcers, 4 traumatic ulcers, and 7 chemical burn ulcers. All patients were treated with focal debridement and pedical conjuctival flap transposition. Results Forty-seven out of 56 (83.9%) were cured after one surgery, and 5 (8.9%) had conjunctival flap retraction, among which 3 underwent the second surgery and 2 had the third surgery to completely heal. Four patients (7.2%) turned to lamellar keratoplasty because of fungal corneal ulcer relapse. Ulcer in 52 patients healed and the globe preserved. They had different levels of vision improvement. Conclusion Pedical conjunctival flap transposition is effective for refractory corneal ulcer.

Objective　To investigate exogenous ceramide-induced apoptosis in colon carcinoma LoVo cells.Methods　LoVo cells were pretreated for 3 h with or without the presence of phorbol 12-myristate 13-acetate (PMA), a potent protein kinase C (PKC) stimulator, later treated with C2-, C6-ceramide or C2-dihydroceramide, and then passed through gel electrophoresis, Heochest 33342 fluorescence staining and flow cytometry with Annexin V/PI staining. The treated LoVo cells were observed for biochemical and morphologic changes. Results　Treatment with C2- or C6-ceramide in the range of indicated concentrations (10～25 μmol/L) for 12 to 24 hours resulted in apoptosis in LoVo cells, whereas C2-dihydroceramide, which is similar to C2-ceramide in configuration but lacks the trans double bond at C4-C5 of the sphingoid base backbone, did not induce the apoptosis at the same or even higher concentrations, indicating that the ceramide-induced apoptosis was stereospecific. Moreover, the exogenous ceramide-induced apoptosis in LoVo cells was inhibited in part by PMA. Conclusion　Ceramide takes part in the process of apoptotic signal transduction in LoVo cells. PKC may be one of downstream target molecules acted by ceramide.