Objective To evaluate the optimal surgical approach for huge liver neopiasms in the caudate lobe.Methods Thirty-three patients with huge liver neplasms（≥10cm) underwent caudate lobectomy at a single tertiary referral center between January 2001 and June 2007.The surgical out-comes of pateints who underwent isolated caudate lobectomy or caudate lobectomy combined with partial hepatectomy were compared.Result Fifteen（45.5％）of 33 patients underwent isolated total or partial caudate lobectomy（group A）,whereas 18（54.5％) had total or partial caudate lobectomy cellular carcinoma (HCC) (51.5％),followed by hemangioma(21.2％),intrahepatic cholangiocarcinoma(9.1％),angiomyolipoma(6.1％),hepatic adenoma (3％),focal nodular hyperplasia(3％),colorectal liver metastases(3％)and sarcoma(3％).The median diameter of the tumour was 12.3 (range,10.2-21)cm.Patients in group A had significantly longer operative time (280 minutes vs.170 minutes),longer length of hospital stay (17 days vs.12 days)and more blood loss(1250 ml vs.670 ml) than patients in group B.There was no perioperative death in the 2 groups of pateints.Complication rates in group A and group B were 26.7％ and 16.7％ respectively.There was no disease-related death in patients with benign lesions.The1-,3- and 5-year disease-free survivals of patients with malignant lesions in group A and group B were 25.9％,0％,0％and 74.3％,46.7％,31.2％,respectively.The 1-,3- and 5-year overrall survivals were 68.6％,19.7％,0％ and 100％,66.5％,41.8％,respecively.Conclusion The approach to caudate lobectomy depends on the size and location of the lesion and the liver functional reserve.For patients with sufficient liver functional reserve,caudate lobectomy combined with partial hepatectomy is preferred because it is technically less demanding.For patienls with marginal liver functional reserve,isolated caudate lobectomy is the only viable surgical option.

Objective To evaluate the techniques and the effects of resection of giant hepatic tumors in the caudate lobe of the liver. Methods The clinical data of 33 patients with primary liver carcinoma or benign tumor (>10 cm) in the caudate lobe of the liver surgically treated in our hospital from January 2000 to January 2007 were retrospectively analyzed. Results The total of 33 huge liver tumors with a median diameter of 12.3 cm (10.2-15.3cm) were successfully resected. The types of the hepatectomies conducted were as follows:isolated total caudate lobectomy in 7cases, partial cau-date lobectomy in 8, caudate lobectomy plus other extended hepatectomy in 18. The median operative time was 218 min (120-360 min) and the median intraoperative blood loss 958 ml (400-7000 ml),with operative mortality and morbidity being 0 and 27%, respectively. The postoperative 1-, 3- and 5-year survival rates for the patients with primary liver cancer were 76 %,52% and 24%, respectively. Con-clusion The hepatic tumors of caudate lobe, when larger than 10 cm in diameter, frequently involves all the hepatic portal,hepatocaval confluence and retrohepatic IVC. Though it is sophisticated in tech-nique, surgical resection of this kind of tumor is safe, effective and of the first choice.

Objective:To investigate the efficiency and pharmacoeconomics of pegylated recombinant human granulocyte colony-stimulating factor (PEG-rhG-CSF) for mobilization of peripheral blood stem cells (PBSCM) in patients with multiple myeloma (MM).Methods:The data of 91 patients with newly treated MM who were hospitalized in the First Hospital of Jilin University and Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College from January 2015 to October 2017 were retrospectively analyzed. According to the patient's wishes, a high-dose chemotherapy combined with subcutaneous injection of PEG-rhG-CSF or recombinant human granulocyte colony-stimulating factor (rhG-CSF) was used for stem cell mobilization in 42 and 49 patients, respectively. The number of mononuclear cells (MNC) and CD34 + cells collected after mobilization, the maximum absolute neutrophil count (mANC), the cost of mobilization, and the engraftment time of white blood cells and platelets after transplantation were compared between the two groups. Results:The median number of MNC collected after mobilization in the PEG-rhG-CSF group and rhG-CSF group were 5.86×10 8/kg [(1.08-24.54)×10 8/kg] and 6.61×10 8/kg [(0.83-33.80)×10 8/kg], and the difference was not statistically significant ( U = 883.00, P = 0.245); while the median number of CD34 + cells collected after mobilization in the PEG-rhG-CSF group was higher than that in the rhG-CSF group [5.56×10 6/kg (0.94-19.90)×10 6/kg and 4.82×10 6/kg (1.12-14.61)×10 6/kg], and the difference was statistically significant ( U = 732.00, P = 0.038). The median number of mANC during mobilization in the PEG-rhG-CSF group was lower than that in the rhG-CSF group [20.50×10 9/L (7.26-61.30)×10 9/L and 32.08×10 9/L (6.92-69.99)×10 9/L], and the difference was statistically significant ( U = 490.00, P = 0.001). After autologous stem cell transplantation (ASCT), the time-to-recovery of white blood cell count (WBC) to 1.0×10 9/L in the PEG-rhG-CSF group was shorter than that in the rhG-CSF group [(11.59±1.98) d vs. (12.93±2.83) d], and the difference was statistically significant ( t = -2.395, P = 0.019), and the time-to-recovery of platelet count (Plt) to 20.0×10 9/L in the PEG-rhG-CSF group was also shorter than that in the rhG-CSF group [(12.86±2.62) d vs. (14.80±5.47) d], but the difference was not statistically significant ( t = -1.749, P = 0.085). The total mobilization cost of the PEG-rhG-CSF group was not statistically different from that of the rhG-CSF group [(21 405.47±7 365.98) yuan vs. (22 976.83±10 264.34) yuan, t = -0.721, P = 0.474]. Conclusions:PEG-rhG-CSF combined with high-dose chemotherapy is an effective option for PBSCM in MM patients, and its mobilization cost is equivalent to rhG-CSF. Therefore, PEG-rhG-CSF may be a better choice for PBSCM in MM patients.

Objective The aim of this study was to investigate whether the addition of neoadjuvant chemoradiotherapy ( NACRT ) to surgery can improve outcomes better than neoadjuvant chemotherapy in terms of rate of R0 resection, pathological complete response ( pCR ) and side effects. Methods This exploratory study included primary gastric adenocarcinoma patients staged as clinical T4N0 or anyTN1-3. Intensity modulated radiotherapy was delivered of 40 to 50 Gy in 22 to 25 fractions,5 days/week.Concurrent chemotherapy regimens included S-1 or Capecitabine or a combination of Paclitaxel plus Carboplatin.Results Eleven eligible patients were enrolled. R0 and R2 resections were performed in 9 ( 9/11) and 1 patients, respectively.Peritoneal metastasis was found in 1 case during exploratory laparotomy.The pCR was observed in 1 patient with R0 resection ( 1/10 ) . Ten cases completed radiotherapy and 8 cases completed chemotherapy. Nausea ( 3/11 ) , vomit ( 2/11 ) and anorexia ( 2/11 ) were the most common Grade 3 toxicities. Conclusions NACRT showed an acceptable toxicity and promising activity in locally advanced gastric adenocarcinoma.

Objective:To test the psychometric properties of the super brief-pathological narcissism inventory(SB-PNI) in Chinese college students.Methods:A total of 541 college students were recruited through convenient sampling method.All subjects were measured by SB-PNI, fear of missing out scale(FOMOs), Interpersonal Communication Scale and Social Interaction Scale.SPSS 25.0 was used for item analysis, criterion related validity analysis and Cronbach α coefficient. Mplus 7.4 software was used for structural validity analysis.Results:Through the construct validity analysis, it was found that the Bi-factor model was well fitted.SB-PNI presented a better Bi-factor structure(χ 2/ df=2.03, CFI =0.96, TLI=0.94, RMSEA=0.04, SRMR=0.04), namely a general factor and two local factors (grandiose narcissism and vulnerable narcissism). The score of SB-PNI was positively correlated with grandiose narcissism, vulnerable narcissism, interpersonal communication, social interaction and fear of missing out ( r=0.13-0.85, all P<0.01). The Cronbach's α coefficients of SB-PNI degreed from 0.74 to 0.81.The composite reliability of SB-PNI degreed from 0.75 to 0.84.The retest reliability of SB-PNI degreed from 0.75 to 0.85.The homogeneity reliability of SB-PNI was 0.64. Conclusion:The Chinese version of the SB-PNI has good validity and reliability among Chinese college students.

Attention level evaluation refers to the evaluation of people's attention level through observation or experimental testing, and its research results have great application value in education and teaching, intelligent driving, medical health and other fields. With its objective reliability and security, electroencephalogram signals have become one of the most important technical means to analyze and express attention level. At present, there is little review literature that comprehensively summarize the application of electroencephalogram signals in the field of attention evaluation. To this end, this paper first summarizes the research progress on attention evaluation; then the important methods for electroencephalogram attention evaluation are analyzed, including data preprocessing, feature extraction and selection, attention evaluation methods, etc.; finally, the shortcomings of the current development in the field of electroencephalogram attention evaluation are discussed, and the future development trend is prospected, to provide research references for researchers in related fields.
Humans ; Reproducibility of Results ; Electroencephalography

BACKGROUND:Changes in skeletal muscle mass have been indicated in studies addressing the effects of low-frequency pulsed magnetic fields on the structure and morphology of the skeletal muscle,but no relevant studies have been conducted on the morphologic changes that occur after chronic exposure to the low-frequency pulsed magnetic field. OBJECTIVE:To observe the effects of chronic exposure to low-frequency pulsed magnetic fields on the maximal voluntary contraction and morphologic indicators of the quadriceps muscle of the leg,thereby providing a reference of muscle morphologic changes for the use of this technique as a strategy for muscle function improvement. METHODS:Seventy healthy subjects were recruited and randomly divided into a test group that received magnetic field stimulation and a control group that underwent sham treatment,with 35 subjects in each group,and the total duration of the trial was 4 weeks.The test group underwent low-frequency pulsed magnetic stimulation for 15 minutes every 48 hours,while the control group underwent sham treatment,with the same intervention interval and duration as the test group.After 4 weeks of intervention,changes in the maximum voluntary contraction value of the quadriceps muscle in different groups were observed,and B-mode ultrasonography was utilized as a means of assessment to observe changes in muscle thickness,muscle cross-sectional area,and pinnation angle indexes. RESULTS AND CONCLUSION:After 4 weeks of chronic exposure to low-frequency pulsed magnetic fields,68 subjects completed the test.The maximum voluntary contraction value of the quadriceps muscle in the test group increased significantly(P=0.000),and the increment was significantly higher than that of the control group(P=0.008).Three indexes related to muscle morphology in the test group were significantly higher than the pre-test values(P=0.000),while in the control group,muscle thickness showed a significant reduction(P=0.020),there was no significant change in the pinnation angle,but a significant increase in the cross-sectional area(P=0.000).Intergroup comparisons revealed that the three indicators related to muscle morphology,including muscle thickness(P=0.012),pinnation angle(P=0.003),and cross-sectional area(P=0.049),were significantly higher in the test group than in the control group.The above data confirmed that the maximum voluntary contraction of the quadriceps muscle was significantly increased in healthy adults after 4 weeks of chronic exposure to the low-frequency pulsed magnetic field,and significant increases in the three muscle morphometric indices of muscle thickness,cross-sectional area,and pinnation angle were observed in the test group,providing a basis of muscle tissue morphology for the use of this technique as an exercise alternative and medical treatment strategy for muscle improvement.

Inflammatory bowel disease (IBD) is characterized by recurrent non ⁃ specific intestinal inflammatory responses. Intestinal fibrosis is an important cause of IBD complicated with intestinal obstruction. Nuclear factor erythroid 2⁃ related factor 2 (Nrf2) is a transcription factor that has anti ⁃ oxidative stress response in cells. In IBD, Nrf2 and its downstream regulated antioxidant enzymes achieve protective effects against intestinal fibrosis by inhibiting the activation of nuclear factor ⁃ κB, regulating T helper cell 17/regulatory T cell balance of intestinal immunity, and inhibiting transforming growth factor⁃β1/Smads signaling pathway. In this review, the structure of Nrf2, the specific mechanism of Nrf2's effect on intestinal fibrosis in IBD, and the recent studies on the treatment of IBD through Nrf2 pathway were reviewed in an attempt to provide a new direction for the prevention and treatment of IBD.

Objective:To compare the outcomes of watch&wait (W&W) strategy in patients with locally advanced rectal cancer who achieved complete clinical response (cCR) after neoadjuvant therapy, with those who obtained pathological complete response (pCR) after total mesorectal excision (TME).Methods:This is a retrospective cohort analysis study. Patients histologically proven with locally advanced rectal adenocarcinoma (stage Ⅱ-Ⅲ) who had received neoadjuvant chemotherapy were eligible between January 2014 and December 2019. In whom we included patients who had cCR offered management with W&W strategy after completing neoadjuvant therapy and follow-up ≥1 year (W&W group), and patients who did not have cCR but pCR after TME (pCR group). The primary endpoints were 3-year and 5-year overall survival (OS), colostomy-free survival (CFS), disease-free survival (DFS), non-local regrowth disease-free survival (NR-DFS), and organ preservation rate. Kaplan-Meier analysis was used for survival analysis and log-rank test was performed. For comparative analysis, we also derived one-to-one paired cohorts of W&W versus pCR using propensity-score matching (PSM).Results:A total of 118 patients were enrolled, 49 of whom had cCR and managed by W&W, 69 had pCR, with a median follow-up period of 49.5 months (12.1-79.9 months). No difference was observed in the 3-year OS (97.1% vs. 96.7%) and 5-year OS (93.8% vs. 90.9%, P=0.696) between the W&W and pCR groups. Patients managed by W&W had significantly better 3-year and 5-year CFS (89.1% vs. 43.5%, P<0.001), better 3-year DFS (83.6% vs. 97.0%) and 5-year DFS (83.6% vs. 91.2%, P=0.047) compared with those achieving pCR. The 3-year NR-DFS (95.9% vs. 97.0%) and 5-year NR-DFS (92.8% vs. 97.0%, P=0.407) did not significantly differ between the W&W and pCR groups. Local regeneration occurred in six cases, and 87.7% of patients had successful rectum preservation in the W&W group. In the PSM analysis (34 patients in each group), absolutely better CFS (90.1% vs. 26.5%, P<0.001) was noted in the W&W group. A median interval of 17.5 weeks was observed for achieving cCR, while only 23.9% of patients achieved cCR within 5 to 12 weeks from radiation completion. Patients with short-course sequential chemoradiotherapy achieved cCR significantly later when compared with those with long-course concurrent chemoradiotherapy (19.0 vs. 9.8 weeks, P<0.001). Conclusions:The oncological outcomes of W&W strategy in patients with locally advanced rectal cancer are safe and effective, significantly improving the quality of life. Longer interval for cCR evaluation may improve rectal organ preservation rate.

Objective:To investigate the relationship between gastric filling status and intra-or inter-fractional tumor displacement in patients with adenocarcinoma of the esophagogastric junction (AEG) undergoing preoperative radiotherapy.Methods:From October 2018 to June 2019, 10 patients with locally advanced AEG who received totally neoadjuvant therapy were enrolled in this prospective study. Patients received two markers implanted at the cranial and caudal borders of the tumors under gastroscope and a total of 20 fiducial markers were implanted finally. All patients underwent 4DCT scan under the gastric fasting and filling status. Ten images of 0% to 90% respiratory phase were automatically reconstructed by the system (Pinnacle 3, version 9.1, Philips Medical Systems, Eindhoven, The Netherland). Each patient obtained one hundred sets of images. Results:In the tumors proximal to the chest, gastric filling did not significantly affect intrafractional or interfractional tumor displacements. Nevertheless, in the tumors distal to the chest, the interfractional displacement in the cranio-caudal (CC) direction under the gastric fasting status was significantly larger compared with that under the gastric filling status (6.22±4.67 mm vs. 4.13±3.68 mm, P=0.013). To ensure 95% of the prescribed dose irradiated to at least 90% of the tumor volume during the radiotherapy, the margins of tumors proximal to the chest in the left-right (LR), antero-posterior (AP) and CC directions were 9 mm, 8.5 mm, 12.1 mm under gastric filling status with 300 ml semi-fluid. Six patients diagnosed with gastric cancer with proximal thoracic fiducial markers treated by preoperative radiotherapy were included in the validation group, revealing that the fiducial markers of 93% patients were covered in this margin. Conclusion:During the preoperative radiotherapy in AEG patient, the approach of quantitative gastric filling can be considered.