From 1977 to 1990, 50 patients with renal cell carcinoma were given postoperative radiotherapy. The 3-,5- and 10-year survival rates were 60.0%,51.5% and 31.8%. The 5-year survival rate of StageⅠ～Ⅱ lesions was 69.2% and that of stageⅢ～Ⅳ lesions was 43.8%, which are better than those treated by surgery alone. Regional lymphatic metastasis, invasion of the nearby organs and vena caval cancerous thrombosis were the ominous signs, especially the former two. 83.3% of the patients died of distant metastasis. Lung was most common(58.3%)and then, bone metastasis (25.6%). The authors believe newer combination therapy against distant metastasis is needed to improve the results.

Objective To explore the rationality of correcting urinary iodine (UI) concentration by using urine specific gravity (U-SG).Methods Weighing method and refractometer method were used respectively to measure specific gravity of 10-30 g/L mass concentration of different inorganic salts (sodium chloride,sodium sulfate,ammonium biphosphate) and organic matters(urea,glucose,glycine) aqueous solution,and urine plus 10-30 g/L sodium chloride or urea.UI concentrations in urine samples of 27 pregnant women respectively were expressed by direct method,weighing method U-SG correction and refractometer method U-SG correction.One random urine sample was collected for six batches in different seasons from children aged 8-10 and pregnant women for determination of U-SG and UI concentration.UI concentration was determined by arsenic cerium catalytic spectrophotometry (WS/T 107-2006).Results ①Measured by weighing method,specific gravity of inorganic salt (sodium chloride,sodium sulfate,ammonium biphosphate) aqueous solution was significantly greater than that of organic matters (urea,glucose,glycine) aqueous solution which had the same mass concentration.The specific gravity of 10 g/L sodium chloride aqueous solution was 1.008,and that of 30 g/L urea solution was 1.006.②Measured by weighing method,10 g/L sodium chloride was added to 3 urine samples separately.Accordingly the increases of USG were 0.006,0.008 and 0.007,respectively.Otherwise,the increases of U-SG were 0.003,0.002 and 0.004,respectively,when adding 10 g/L urea.~he median results of UI concentrations in urine samples from 27 pregnant women were 106.4,165.2 and 211.8 μg/L,respectively,expressing obtained by direct method,weighing method USG correction and refractometer method U-SG correction.④The determination results of six batches urine collected from children aged 8-10 in different seasons,the median results of U-SG measured by refractometer method were 1.019 0-1.021 2,the median UI concentration results obtained by direct method and refractometer method U-SG correction were 134.5-181.7 μg/L and 157.7-190.4 μg/L.The determination results of six batches urine samples of pregnant women in different seasons,the median results of U-SG measured by refractometer method were 1.013 4 -1.017 1,the median UI concentration results obtained by direct method and refractometer method U-SG correction were 96.2-138.9 μg/L and 135.2-181.6 μg/L.Conclusions The change of sodium chloride concentration in urine is the most important reason for the change of U-SG.In China,the main source of UI is the intake of edible iodized salt.Iodized salt intakes directly affect the U-SG and UI concentration.If the U-SG is used to correct the UI concentration,there will be a phenomena that the lower intake of iodized salt the lower U-SG.So the UI concentration was falsely increased significantly after correction.Conversely higher intakes of iodized salt caused higher U-SG.The UI concentration was falsely reduced significantly after correction.Therefore,U-SG cannot be used to correct the UI concentration.

Objective To assess the value of S index and FIB-4 for diagnosis of liver fibrosis in patients with chronic hepatitis B (CHB) by comparing with traditional indexes APRI and Forns.Methods A total of 361 patients with confirmed CHB from the First Hospital of Nanjing Medical University and Huashan Hospital Affiliated to Fudan University during January 2006 and December 2011 were enrolled in the study.The clinical,laboratory and pathological data of patients were collected.Four noninvasive score systems APRI,Forns,S index and FIB-4 were computed.With liver biopsy as the gold standard,the area under the ROC curve (AUROC) was used to assess the value of above 4 score systems in diagnosis of liver fibrosis,and Z test was performed to evaluate the effectiveness of above systems.Results The areas under ROC curve (AUCs) of APRI,Forns,S index and FIB-4 for significant fibrosis (≥S2) were (0.737 ±0.027),(0.716 ± 0.028),(0.745 ± 0.026) and (0.781 ± 0.025),respectively.When the cut off value of FIB-4 was set at 1.62,the sensitivity,specificity,positive predictive value (PPV) and negative predictive value (NPV) for diagnosis of significant fibrosis were 59.3％,85.8％,89.4％ and 51.2％,respectively,which were better than Forn index (Z =3.28,P =0.001).While for S4 (cirrhosis) the AUCs of APRI,Foms,S index and FIB-4 were (0.687 ± 0.035),(0.792 ± 0.028),(0.863 ± 0.024) and (0.832 ± 0.025),respectively.When the cut off value of S index was set at 1.06,the sensitivity,specificity,PPV and NPV for diagnosis of cirrhosis were 77.9％,85.5％,59.4％ and 93.5％,respectively,which were better than APRI and Forns (Z =6.74 and 3.21,P ＜ 0.01).Conclusions APRI,Forns,S index and FIB-4 are simple and accurate methods for assessing liver fibrosis.FIB-4 and S index are better than APRI and Forns in diagnosis of significant fibrosis and cirrhosis,which may replace liver biopsy in certain extend.

Objective: To investigate the serum levels and clinical significances of microRNA-205 (miR-205) and microRNA-221 (miR-221) in patients with colon cancer. Methods: A total of 172 patients with colon cancer (colon cancer group), 130 patients with benign diseases of colon (benign lesion group) and 70 healthy persons (control group) admitted to Central Hospital of Western Hainan from January 2016 to December 2018 were selected. The serum levels of miR-205 and miR-221 in each group were detected, and their relationships with clinicopathological characteristics of patients with colon cancer were analyzed. The diagnostic values of the serum levels of miR-205 and miR-221 in colon cancer were analyzed by receiver operating characteristic (ROC) curve. Pearson correlation analysis was used to analyze the correlation between the serum levels of miR-205 and miR-221. Results: The serum levels of miR-205 in colon cancer group, benign lesion group and control group were 2.84±0.96, 1.16±0.27 and 1.05±0.23, with a statistically significant diffe-rence (F=10.113, P<0.001). The serum levels of miR-221 in the three groups were 1.95±0.74, 0.37±0.08 and 0.32±0.05, with a statistically significant difference (F=12.416, P<0.001). Further pairwise comparisons found that the serum levels of miR-205 and miR-221 in colon cancer group were significantly higher than those in benign lesion group and control group (all P<0.001). The serum levels of miR-205 and miR-221 in patients with colon cancer were related with TNM stage (t=5.412, P<0.001; t=6.103, P<0.001), degree of tumor differentiation (t=4.573, P=0.028; t=4.805, P=0.013) and with or without lymph node metastasis (t=5.837, P<0.001; t=7.410, P<0.001). ROC curve analysis showed that the optimal cut-off values of the serum levels of miR-205 and miR-221 for the diagnosis of colon cancer were 2.17 and 1.30, respectively. The area under the curve of the two combined diagnostic method for colon cancer was the largest (0.924, 95%CI: 0.865-0.983), with the sensitivity and specificity of 91.3% and 87.4%. The correlation analysis showed that the serum levels of miR-205 and miR-221 were positively correlated in patients with colon cancer (r=0.837, P<0.001). Conclusion The serum levels of miR-205 and miR-221 are significantly increased in patients with colon cancer, and the two combined detection has a high value for the diagnosis of colon cancer.

BACKGROUND:Intra-articular injection played an important role in the treatment of osteoarthritis and has more options with the development of novel drug delivery systems.The cartilage targeting function is aimed at the adhesion or retention of drugs in the cartilage layer to form a drug bank to achieve slow release and precise drug delivery. OBJECTIVE:To review various cartilage targeting biomaterials and their characteristics in the treatment of osteoarthritis by articular injection. METHODS:Using the term"osteoarthritis,drug carrier,drug delivery,cartilage targeting,penetrate"as key words,relevant articles were searched in CNKI,WanFang and PubMed databases.According to inclusion and exclusion criteria,67 articles were finally selected for further review. RESULTS AND CONCLUSION:The research on cartilage-targeting biomaterials is mainly divided into two directions.One is the combination of electrostatic interaction,such as the combination of positively charged biomaterials and negatively charged polysaccharides in cartilage.This kind of scheme is operable and easy to modify,but limited by the shortcomings of electrostatic interaction itself,it performs badly in advanced osteoarthritis.Another one is the specific binding of various components in cartilage which is strong and reliable,and related biomaterials have excellent performance in advanced osteoarthritis,which is an important direction for future cartilage-targeted therapy.

Objective:To investigate the willingness of medical students to work in primary health care institutions.Methods:A cross-section survey was conducted to investigate the willingness and the reasons, involving 597 undergraduate medical students and 2088 junior college students.Results:The employment willingness of undergraduate medical students was relatively low (14.9%), while the employment willingness of junior college students was high (56.02%). The top three factors of low employment willingness were: less opportunities for personal development, poor working environments and welfare. Moreover, the most effective method to cultivate medical students was developing a free training project for rural-oriented medical students, and the best method to attract medical students was formulating a more beneficial comprehensive policy.Conclusion:The willingness of clinical medical students to be employed in primary health care institutions is low for the time being. It is suggested to improve their willingness by improving welfare benefits, providing personal development opportunities, and strengthening social security.

OBJECTIVETo observe the effect of exercise preconditioning (EP) on pressure overload-induced pathological cardiac hypertrophy and explore related mechanisms.

METHODSTen-week-old male Sprague-Dawley rats (n = 80) were randomly divided into four groups via random number table method: sham, TAC, EP + sham and EP + TAC. Two EP groups were subjected to 4 weeks of treadmill training, and followed by sham and TAC operations. Eight weeks after the surgery, mean arterial pressure (MAP), cardiac morphology, mRNA expressions of the B-type natriuretic peptide (BNP) and heat shock protein (HSP) 70 and protein expression of the BNP, heat shock transcription factor 1 (HSF1), HSP70, nuclear factor κB (NF-κB) p65, and interleukin-2 (IL-2) were examined.

RESULTS(1) Pathological cardiac hypertrophy index: eight weeks after TAC, MAP, heart size, HW/BW, cross-sectional area of the cardiomyocytes (CSA) and mRNA and protein expressions of BNP in the LV were all significantly higher in the TAC and EP + TAC groups than respective sham groups (all P < 0.05). HW/BW, CSA, and mRNA and protein expressions of BNP in the LV were significantly lower in EP + TAC group than in TAC group (all P < 0.05). (2) mRNA and protein expressions of HSF1 and HSP70 and nuclear HSF1 levels were significantly downregulated post TAC, however, EP treatment significantly increased the expression of HSF1 and nuclear HSF1 levels in TAC rats (all P < 0.05). (3) mRNA and protein expressions of NF-κB p65 and IL-2 were significantly increased in the TAC and EP + TAC groups compared with the respective sham groups (all P < 0.05), which were significantly downregulated in EP + TAC group compared to TAC group (all P < 0.05).

CONCLUSIONSEP could effectively reduce the cardiac hypertrophic responses induced by TAC possibly through upregulating the expressions of HSF1 and HSP70 and inhibiting the expression of NF-κB p65 and its nuclear translocation.

Animals ; Cardiomegaly ; DNA-Binding Proteins ; Down-Regulation ; HSP70 Heat-Shock Proteins ; Heat Shock Transcription Factors ; Interleukin-2 ; Male ; Myocytes, Cardiac ; Natriuretic Peptide, Brain ; Physical Conditioning, Animal ; RNA, Messenger ; Rats ; Rats, Sprague-Dawley ; Signal Transduction ; Transcription Factor RelA ; Transcription Factors

Objective:To study the factors affecting the training quality satisfaction of the visiting physicians and to explore ways to improve the satisfaction and the training quality.Methods:The research data was collected by questionnaires and interview from 44 visiting physicians of hematology department in Peking University People's Hospital, and statistical analysis method was used to analyze the influencing factors of their satisfaction with training.Results:The higher the evaluation score of teaching activities, the tutor's professional knowledge and teaching ability was, the higher overall satisfaction was. Women had higher satisfaction than men. The older the physicians were and the shorter the training was, the higher the satisfaction was.Conclusion:In order to further improve the refresher training satisfaction of visiting physicians, we should carry out teaching activities with high quality, improve the teaching level and professional knowledge of tutors, strengthen scientific research training, and formulate personalized training plans for the visiting physicians.

Objective To investigate clinical effects and prognostic factors of transabdominal laparoscopic-assisted and open radical resection for Siewert type Ⅱ and Ⅲ adenocarcinoma of the esophagogastric junction (AEG).Methods The retrospective cohort and case-control studies were conducted.The clinicopathologieal data of 84 patients with Siewert type Ⅱ and Ⅲ AEG who were admitted to the First Affiliated Hospital of Xiamen University from January 2014 to January 2017 were collected.Among 84 patients,42 undergoing transabdominal laparoscopic-assisted radical gastectomy (LARG) were allocated into LARG group and 42 undergoing transabdominal open radical gastectomy (ORG) were allocated into ORG group.Observation indicators:(1) comparison of intraoperative and postoperative recovery situations between groups;(2)comparison of follow-up and survival situations between groups;(3) prognostic analysis of patients with Siewert type Ⅱ and Ⅲ AEG undergoing transabdominal radical resection.Follow-up using outpatient examination and telephone interview was performed to detect postoperative survival situations,tumor recurrence and metastasis of patients up to January 2018.Measurement data with normal distribution were representde as-x±s,and comparison between groups was analyzed using the t test.Measurement data with skewed distribution were described as M (range).Comparison of count data were analyzed using the ehi-square test or Fisher exact probability.Ordinal data were compared between groups using the Mann-Whitney U nonparametric test.The survival rate and curve were respectively calculated and drawn by the Kaplan-Meier method,and Log-rank test was used for survival and univariate analyses.Multivariate analysis was done by COX proportional hazard model.Results (1) Comparison of intraoperative and postoperative recovery situations between groups:patients with Siewert type Ⅱ and Ⅲ AEG in the LARG and ORG group underwent successful transabdominal radical resection,without conversion to thoracotomy.All patients in the LARG group underwent esophagojejunostomy with circular stapler device,38 and 4 patients in the ORG group underwent esophagojejunostomy with circular stapler and linear cut stapler respectively.Operation time,volume of intraoperative blood loss,length of incision,time of postoperative analgesia,cases with anastomotic bleeding,anastomotic leakage,abdominal bleeding,incisional infection,pulmonary infection,abdominal infection and reflux esophagitis of grade Ⅰ ～ Ⅱ postoperative complications and duration of postoperative stay were respectively (261±50)minutes,(119±111)mL,(7.8±1.6)cm,(2.1±1.3)days,1,1,0,0,1,0,0,(12.8 ± 1.9) days in LARG group and (216 ± 52) minutes,(230± 178) mL,(17.3± 1.8) cm,(3.4±1.2)days,2,0,2,2,2,1,2,(18.4±15.3)days in ORG group,with statistically significances between groups (t =2.357,2.960,2.195,2.013,x2 =5.486,t =2.125,P＜0.05).All patients with complications were improved by symptomatic treatment.(2) Comparison of follow-up and survival situations between groups:81 of 84patients including 41 in LARG group and 40 in ORG group were followed up for 6-48 months,with a median time of 29 months.The postoperative 2-year overall and tumor-free survival rates were respectively 85.1％ and 82.1％ of 41 patients in LARG group and 83.1％ and 79.3％ of 40 patients in ORG group,with no statistically significance between groups (x2 =0.013,0.049,P＞0.05).(3) Prognostic analysis of patients with Siewert type Ⅱ and Ⅲ AEG undergoing transabdominal radical resection:results of univariate analysis showed that tumor diameter,tumor TNM staging,tumor T staging,tumor N staging and postoperative adjuvant chemotherapy were related factors affecting prognosis of patients with Siewert type Ⅱ and Ⅲ AEG undergoing transabdominal radical resection (x2 =8.349,14.376,9.732,17.250,8.012,P＜0.05).Results of multivariate analysis showed that tumor TNM staging and postoperative adjuvant chemotherapy were independent factors affecting prognosis of patients with Siewert type Ⅱ and Ⅲ AEG undergoing transabdominal radical resection (risk ratio =4.305,0.031,95％ confidence interval:1.858-9.977,0.004-0.246,P＜0.05).Conclusions Transabdominal laparoscopicassisted radical resection for AEG is safe and feasible,with advantage of minimally invasiveness,having equivalent long-term effects compared to open surgery.Tumor TNM staging and postoperative chemotherapy are independent factors affecting prognosis of patients with Siewert type Ⅱ and Ⅲ AEG undergoing transabdominal radical resection.

Objective:To evaluate the patch technique in repairing huge rotator cuff tear.Methods:A retrospective analysis was conducted of the 9 patients with huge rotator cuff tear who had been repaired with patch technique at Department of Orthopaedics, Guangzhou Red Cross Hospital from March 2017 to March 2019. They were 5 males and 4 females, aged from 53 to 79 years (average, 61 years). Shoulder movement limitation was found in 7 cases, night pain in 5, and positive Neer impingement sign and Hawkins sign in 7. By the Bigliani acromion classification, there were 6 cases of type Ⅱ and 3 cases of type Ⅲ. Comparisons were made between preoperation, 12 and 15 months postoperation in terms of scores of the visual analogue scale(VAS) and the University of California Los Angeles (UCLA) scoring system, and shoulder range of motion.Results:All the 9 patients were followed up for 15 to 24 months(mean, 18 months). Arthroscopy found tears in more than 2 tendons in all of them. The VAS scores were 6.7±1.6, 4.5±1.3 and 3.7±1.1 at preoperation, 12 and 15 months postoperation; the UCLA scores were 7.9±1.2, 21.5±4.1 and 23.9±4.3 at preoperation, 12 and 15 months postoperation. There were statistically significant differences in both the VAS and UCLA scores between preoperation, 12 and 15 months postoperation ( P<0.05). There were also statistically significant differences between the 3 groups in the shoulder range of motion at preoperation, 12 and 15 months ( P<0.05). MRI reexamination at 12 months postoperation showed minor re-tear < 3 cm in 2 patients. Conclusion:The patch technique is a reasonable and effective treatment to repair huge rotator cuff tears, resulting in good mid-term outcomes.